I tried competitive and left because it wasn't fun. The fast pacing clashes with the realistic mechanics, hit registration is horrible (at least compared to co-op), and a couple of teammates were toxic. I didn't play another, though (and don't plan to).
I've noticed bots will actually shoot before aiming at you. Sometimes they hit even when not looking at you. They seem to know where you are exactly sometimes, even when you've made no noise. They still run like 30mph at times, with broken run animations. The developers have had several months to fix these issues and it's getting ridiculous. I wonder what they are doing.