I don't understand why people are so obsessed with Adobe, since their software nowadays isn't that good. There are tons of alternatives out there that work better and do the same thing, if not more.
Is it just laziness/reluctance to learn something new?
Affinity Photo. Much more stable than Photoshop and I like it a lot, but there are things Photoshop does that Affinity doesn't and I can't think of anything that goes the other way.
Krita. Fairly sleek, especially for OSS. Becoming very competitive for digital illustration, but not (and not intended to be) a great photo editor.
paint.net. Good for fast edits but simplified, not a true competitor.
GIMP. Ancient, slow, ugly, clunky, severely lacking in features, and somehow even less stable than Photoshop.
If you are just doing graphic work yourself, there are other applications like Affinity that can work, as long as you are not collaborating.