No, I just hope you'd read what's actually written over the error of what you're explaining. Peter doesn't contradict Paul. Peter & Paul actually contradict you, sad to say. All we have to do is go back into Peter's letter and he explains what he meant by the error of lawless.
2 Peter 1:4-7
Through these He has given us His precious and magnificent promises, so that through them you may become partakers of the divine nature, now that you have escaped the corruption in the world caused by evil desires.
5 For this very reason, make every effort to add to your faith virtue; and to virtue, knowledge; and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; and to godliness, brotherly kindness; and to brotherly kindness, love.
First, no matter which version you read, Peter tells the reader to put forth every effort to be godly. This directly contradicts your teaching of "no human effort" required or allowed. But what is "godliness" vs. "ungodliness"?
2 Peter 2:4-8
For if God did not spare the angels when they sinned, but cast them deep into hell, placing them in chains of darkness to be held for judgment; if He did not spare the ancient world when He brought the flood on its ungodly people, but preserved Noah, a preacher of righteousness, among the eight; if He condemned the cities of Sodom and Gomorrah to destruction, reducing them to ashes as an example of what is coming on the ungodly;
7 and if He rescued Lot, a righteous man distressed by the depraved conduct of the lawless (for that righteous man, living among them day after day, was tormented in his righteous soul by the lawless deeds he saw and heard).
Next, no matter which version you read, Peter shares examples of ungodly people being judged over and over again by Yah. He then defines who the ungodly are. They are the LAWLESS. Peter says ungodly people commit lawless deeds. Elder Peter says the ungodly are not law-keepers. He says lawless conduct = depraved conduct, like the people at Sodom and Gomorrah. Sins are lawless deeds.
2 Peter 2:12-17
These men are like irrational animals, creatures of instinct, born to be captured and destroyed. They blaspheme in matters they do not understand, and like such creatures, they too will be destroyed. The harm they will suffer is the wages of their wickedness.
They consider it a pleasure to carouse in broad daylight. They are blots and blemishes, reveling in their deception as they feast with you. 14Their eyes are full of adultery; their desire for sin is never satisfied; they seduce the unstable. They are accursed children with hearts trained in greed.
15They have left the straight way and wandered off to follow the way of Balaam son of Beor, who loved the wages of wickedness. 16 But he was rebuked for his transgression by a donkey, otherwise without speech, that spoke with a man’s voice and restrained the prophet’s madness. These men are springs without water and mists driven by a storm. Blackest darkness is reserved for them. 18 With lofty but empty words, they appeal to the sensual passions of the flesh and entice those who are just escaping from others who live in error.
Again, no matter which version you read, Peter ties lawlessness with wickedness. He also compares walking "the straight way" against those who "live in error". Peter says the lawless have left the straight way and live in error of wickedness, and entice those just escaping (i.e. new converts) to also live in error. Peter says these lawless ones blaspheme in matters they don't understand. So far, it would seem Peter is talking against folks who believe what you teach about the law.
2 Peter 3:11-12 & 14
Since everything will be destroyed in this way, what kind of people ought you to be? You ought to conduct yourselves in holiness and godliness as you anticipate and hasten the coming of the day of God, when the heavens will be destroyed by fire and the elements will melt in the heat.
Therefore, dear friends, while you wait for these things, make every effort to be found without spot or blemish in his sight, at peace.
Again, Peter repeats his instruction to put forth every effort to be without spot or blemish (unlike the lawless). Again, this contradicts the teaching of "no human effort" required or allowed. And finally, we have the passage in question.
2 Peter 3:15-18
Bear in mind that our Lord’s patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. 16 He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
17 Therefore, dear friends, since you have been forewarned, be on your guard so that you may not be carried away by the error of the lawless and fall from your secure position. 18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be glory both now and forever! Amen.
Word for word, no matter the version, Peter, who was an elder of the early church over Paul, is clear in what he means: Ignorant and unstable people distort Paul's words to teach others to live in lawlessness (i.e. "without the law"), and it is an error of wickedness and will lead to destruction, so BE ON YOUR GUARD for those "enticing" people.
This error was occurring in the first century and it's still happening today.