I am also a Fairphone 3 user but I don't notice many issues. Are you sure you are updating /e/ ? I am on verions 0.11 now and it is very rare to have a crash or something else. I also believe apps are updated quite frequently now.
I'm on 0.11, too.
OS crashes are rare ~2 time, maybe. It's minor things, embedded qr-scanner fails, AntennaPod crashes and needs a restart, some Apps like eBay just crash...
But checking the apps I got from /e/'s-Store: They are up-to-date :)
I don't use eBay but AntennaPod crashes occasionally on stock Android. I wonder are these definitely /e/ issues?