Matchup knowledge help

Ive been recently trying to get better at character specific things, but I’ve now come to a realization that it’s not my character that’s bad. It’s my matchup knowledge. Guys I kid you not, maybe 50% of the roster pops up on my loading screen and I just know I’m losing. I’ll watch an anti video on them then 3 days later when I match the character again I can hardly remember everything maybe 1 or 2 punishes but that’s it. How do you guys do it? I know this takes time but I feel like I hit a brick wall rn. If you guys got any tips any videos I should watch maybe even a website please let me know