1.18 Killed my Survival World

 

I was getting ready play my 1.16 World on 1.18 but then it ask to play at 6 chunks my recommended for device and when I got in the world I noticed my FPS was on 1 Cause of reasons I couldn't sleep,mine or pick up items and for some reason whenever I climb scaffolding I can't climb and somehow I can climb with insivble scaffolding