i've been studying for months, yet still see no improvement in online games
You've been on chess.com for almost a year, and in all those months you took 0 lessons and solved 28 puzzles. "Studying for months", sure.
Just to be clear, playing 3-minute blitz with mostly random moves may be fun, but it ain't gonna make you better at chess.
i meant playing and watching videos by studying, and blundering is just too deadly for me beyond 3 minute games
https://www.chess.com/lessons