Performance issues new update ruined it

The game was running perfectly fine before , good gameplay , smooth and very nice , but this new update a few days ago KILLED THE game i’ve tried every possible setting it’s so laggy and glitchy and keeps stuttering in game - in the lobby it’s okay but as soon as i load into a game the performance instantly drops and is extremely stuttering this new update needs fixing it’s unplayable and my gpu usage drops to 30% in game but is at like 80% in the lobby