Huh. Yeah. I did think of that... but since the logs gave me no clue, I was lost obv. Idk what mod causes it or not, but I know my PC is fine (99.9%), aside from my hard disk. But it only had 1 bad sector over the course of 8 years and it did not increase after that. I installed normal MC client and obviously SFC scanned and updated my drivers. So yeah, my PC's okay. Ig it's just a software issue.
Also in logs, it said some crap about intel graphics and such. But other than that I'm clueless as mentioned.