Tired of game crashes (Playstation)

Before Museum comes out, I wanted to replay Hospital and Campus from scratch. Hospital went fine, the only bug seems to be staff not wanting to go to work when you first start a level. Nothing game breaking. Then its Campus turn and...

I played this on ps4 first, and it would crash on the dlc levels A LOT. I reported it many times. This time I upgraded to the ps5 version, and it crashes on every level after an hour or so. Its also laggy. One day it was just crashing while landscaping, even after a restart.

Why so crashy? I know it won't get fixed now, but this has put me off preordering Museum. I love this series, its a real shame.