And if you rename "Dismemberment" into "dismemberment? Capital Letter.
Oh, the "Dismemberment.ini" is not in your GTA directory. Forget the renaming.
The map flickering could be "Online Interiors" Remove the 2 files from your game directory for test. You can keep the "mapfix".
For TrainerV Error update your trainer: https://de.gta5-mods.com/scripts/simple-trainer-for-gtav
If you still get the error try to remove "trainerv.asi" and "trainerv.ini" and see what happens.