The chapter doesn't begin that way, the second chapter does. The third chapter, of which we are concerned, is written thus: "This second epistle, beloved, I now write unto you; in both which I stir up your pure minds by way of remembrance: That ye may be mindful of the words which were spoken by the holy prophets, and of the commandment of us the apostles of the Lord and Savior: Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, and saying, Where is the promise of his coming? for since the fathers fell asleep, all things continue as they were from the beginning of the creation. For this they are willingly ignorant of, that by the word of God, the heavens were of old, and the earth standing out of the water and in the water: Whereby the world that then was, being overflowed with water, perished: But the heavens and the earth which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men. But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day. The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentence. But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with a fervent heat, the earth also and the works that are therein shall be burned up. Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness, Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with a fervent heat? Nevertheless, we, according to his promise, look for a new heavens and a new earth, wherein dwelleth righteousness. Wherefore, beloved, seeing that ye look for such things, be diligent that ye may be found of him in peace, without spot, and blameless. And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you; As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction. Ye therefore, beloved, seeing ye know these things before, beware lest ye also, being led away with the error of the wicked, fall from your own stedfastness. But grow in grace, and in the knowledge of our Lord and Savior Jesus Christ. To him be glory both now and for ever. Amen."
Notice a few things that contradict your view. First, Peter says that "we, according to his promise, look for new heavens and a new earth." According to what promise? The promise of His coming. The we here, aren't questioning His promise as the scoffers are. Next, notice that Peter tells them to "account that the longsuffering of our Lord is salvation." He didn't say it might possibly be salvation if they do this or that, he said account that it is salvation. Those to whom God is longsuffering towards shall be saved. He also warns the beloved not to be led away by the error of the wicked, namely the scoffers mocking the promise of His coming.
The whole discussion here is the end times and the question of why hasn't Christ come back yet. Well, why hasn't He? Is He slack? The scoffers say so. But Peters says no, absolutely not. He's not slack, as they count slackness, but is rather longsuffering toward us. Why? He's not willing for any of us to be lost eternally. All the commands, exhortations, warnings, and instruction is directed at who? The scoffers? No, the beloved, of which Peter counts himself. Basically, you want it to read that God is waiting around for the scoffers to accept Him, so you wrest it to say that, even leaving the clear english that is contained in all translations I've seen.