Bojack seems really depressing from the clips I’ve seen
Facebook does not come on their unlocked phones. I’ve set up my S8 and S23, as well as Note 9 and Note 22 for family and none of them came with bloatware aside from Samsung’s apps. However I got a used Galaxy tablet on AT&T and it had so much crap on it. At least it’s removable using ADB.
I seem to be in the minority, but I’ve never had issues with it resetting my default browser.