You're saying God is unable...insert can not here...to make a world w/o sin. In Genesis 2, everything He made was "good" and "very good ", even Adam. Yet, in His "good" world, evil sprang forth from the serpent, satan.
God creates nothing but "good" and "very good"...
God gave Adam free will, and he blew it for himself, and everyone else...
Free will keeps people away from God...
Sovereign grace draws them to Him...
God made the world "very good", but what does "very good" mean? For one thing, it means you were born with a free will, you are not a robot. But that freedom (which is very good) enables the possibility of sin, it cannot be avoided.
If God made us robots, then yes, he could make a world without sin. But that would not be good or moral. God is love, he cannot force or compel people to love him, he MUST give them free choice.
And you need to quit saying Adam blew it for us, that is pure error started by the Catholic church and especially Augustine. It was unknown in the early centuries of the church.
God himself said the son shall not bear the iniquity of his father.
Eze 18:20 The soul that sinneth, it shall die.
The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.
God is not unjust, he does not punish a son for the sins his father committed or vice versa. Here is scripture that directly says that, plain as day.
But again, you will completely ignore the word of God and believe what some Calvinist taught you. Very unwise.