"Team lost but I was stronger than my lane opponent"
"He was kicking my ass but I was stronger late game"
That doesn't matter. It doesn't fucking matter. You lost lane and you lost game. Being 'stronger' than one of the opponents late game doesn't mean you did well. The day you learn to accept that you suck is the day you will start to get better. You never learn because you find one thing that you 'did well' and you ignore all the shit you did wrong and then screw up the exact same way in every match to follow. "My team lost but I got my tower so I did my job right" No. Seriously, fucking stop.
Learn from your mistakes instead of riding on one thing you succeeded to do.