The argument works both ways.
No, there was no biblical doctrine of the explicit age of the earth. But once one was erroneously assumed and imposed, the stage was set. And now Christians foolishly argue over that instead of focusing on the fundamental issues that would expose the real errors of atheism. Scientific atheists have a field day with that.
Christian defense of black slavery preceded acceptance of many of the ills cited. Once that was overthrown, those other items illicitly attached themselves and thus found their way in.
Of course there is as God put 6 day creation in the very first chapter one the Bible. It is also in the 10 commandments.
as to truth vs lie, here is God’s condemnation of ALL lies.
God that cannot lie - Titus 1:2
Thy word is truth - John 17:17
Grace and truth came by Jesus Christ - John 1:14
Full of grace and truth - John 1:17
Evil men and seducers .... deceiving and being deceived - 2 Tim 3:13
Let God be true and every man a liar - Romans 3:4
No lie is of the truth - 1 John 2:22
All liars ... lake of fire - Rev 21:8
Speaking the truth in love - Eph 4:15
God give them repentance ... acknowledging of the truth ... snare of the devil - 2 Tim 2:25-26
Love one another, for this ... Thou shall not bear false witness - Romans 13:8-9
False accusers - 2 Tim 3:3
All scripture is given by inspiration of God - 2 Tim 3:16
Holy men of God spake as they were moved by the Holy Ghost - 2 Pet 1:21
Holy Spirit ... Spirit of truth ... guide you into all truth - John 16:13
The fruit of the Spirit is in all ... truth - Eph 5:9
Thou shall not bear false witness - Mark 10:9
Doctrines of devils ... speaking lies in hypocrisy - 1 Tim 4:1-2
Hast found them liars - Rev 2:2
Under falsehood have they hid themselves - Isa 28:15
No wise enter into it ... Make a lie - Rev 21:27
For without ... Loveth and maketh the a lie - Rev 22:15
Received not the love of the truth - 2 Thess 2:10
God shall send them strong delusion that they believe a lie - 2 Thess 2:11
The true worshippers shall worship the Father in spirit and in truth - John 4:23
God is a Spirit and they that worship Him must worship Him in spirit and in truth - John 4:24
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it - John 8:44
Have I become your enemy because I tell you the truth - Gal 4:16
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. - John 14:6
Turned their ears from the truth ... turned unto fables 2 Tim 4:4
The Spirit of truth - John 14:17
The Spirit of truth - John 15:26
Rejoiceth in the truth - 1 Cor 13:6
A faithful witness will not lie: but a false witness will utter lies. - Prov 14:5
Wherefore putting away lying, speak every man truth with his neighbour: for we are members one of another. - Eph 4:25
Loins girt about with truth - Eph 6:14
That they all might be damned who believed not the truth, but had pleasure in unrighteousness. - 2 Thess 2:12
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth. - 2 Tim 2:15
That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive; - Eph 4:14
Prove all things - 1 Thess 5:21
Abstain from all appearance of evil - 1 Thess 5:22
To the law and to the testimony: if they speak not according to this word, it is because there is no light in them. - Isaiah 8:20
17 Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
18 For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple. Rom 16:17-18
2 For I am jealous over you with godly jealousy: for I have espoused you to one husband, that I may present you as a chaste virgin to Christ.
3 But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.
4 For if he that cometh preacheth another Jesus, whom we have not preached, or if ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with him. - 2 Cor 11:2-4
13 For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
14 And no marvel; for Satan himself is transformed into an angel of light.
15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works. - 2 Cor 11:13-15
5 Then the Pharisees and scribes asked him, Why walk not thy disciples according to the tradition of the elders, but eat bread with unwashen hands?
6 He answered and said unto them, Well hath Esaias prophesied of you hypocrites, as it is written, This people honoureth me with their lips, but their heart is far from me.
7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
8 For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
9 And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition.
10 For Moses said, Honour thy father and thy mother; and, Whoso curseth father or mother, let him die the death:
11 But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; he shall be free.
12 And ye suffer him no more to do ought for his father or his mother;
13 Making the word of God of none effect through your tradition, which ye have delivered: and many such like things do ye. Luke 7:5-13