Lots of people are still playing OW. They are planning on doing cross-platform in the near future (as far as I know competitive will be excluded for obvious reasons) and whenever Overwatch 2 happens, the game will see another bump in popularity.
It's still as toxic as ever so I tend not to play competitive any more.. just turn off voice/text chat and have fun in Quick Play. I'm way past the point of caring about rank so that's the best way for me to enjoy the game nowdays. Don't want to deal with salt lords in my free time, know what I mean?