Smashed by a sub 1100 player

I don't know how seriously I would take advice from something that says,

"61... Kg6(+Mat07) FASTER_MATE - You missed a faster checkmate with 61... Ke6 "

I wouldn't exactly say your opponent played flawlessly ... he did miss mate in 1!

From a general point of view (I skimmed through quickly), castling queenside was the wrong idea (too risky), and 18...a5? I don't really understand as it just weakens your position. This kind of stuff left you vulnerable to his pressure on the queenside. Think you probably overestimated your chances around that point as Black is much more difficult to play than White (and is worse objectively, of course).

lol your only 1500 joe lol calm down