Don't know what else to say.No verse says man is unable to please God. Man chooses of his own will to do well or not do well, Gen 4:7
No, it would be God's problem for going against His own nature. God acting in an unloving, unjust, unmerciful way making the bible and Himself out to be liars. Eze 33:11
When God by His grace made salvation available to man, God made certain promises to men.
1) save those that obey, Heb 5:9
2) have vengeance upon those that obey not 2 Thess 1:8
3) God cannot lie
Romans 8:7-8 Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be.
So then they that are in the flesh cannot please God.