No that is not true, even players of equal or higher skill get cocky, they are still human, specially when they think someone is worse then them. I do not consider every person ive beaten as worse then me or stupider. There are plenty of ways to fight against someone you acknowledge as better or equal to you. If you can't beat them with your champions abilities then you need to play differently.
Just because i get the Gnar to jump after me thinking he is going to get a kill, doesn't mean he is stupider or worse then me. It means my bait worked, do you think you are stupid every time you fall for a bait (and dont say you never do because im just going to ignore that lie) im guessing no, at least i dont, it means my opponent used my own strategy against me so good for them. Its called being outplayed and anyone of any skill can do it and have it done to them.
Btw i dont like being insulted when you have never seen me play, so i think you should word your responses less insulting. You are basically saying "You only win with your strategies because you only fight bad people, if you fought good people you would lose." So im like just barely above terrible people but definitely below good people? Thats pretty rude pal, i dont recall insulting you so wth is up with that...