Getting demoralized

Ive been stuck for weeks at 820 elo playing almost every day but just can’t seem to get out of that, I try to analyze my mistakes but then I go in the next match and basically make the same one again, and when I win in a lot of cases it’s due to a massive blunder of the opponent I never feel like I won the game but it’s more like the opponent lost it. So yeah I’m getting a bit demoralized, has anyone else felt something like that at some point?