@wgahnagl yeah, that's rough.
If it's helpful, you could try interpreting it as a worker solidary in laziness wink. It's not like your coworker is likely to become less of an ass, but it might make your days more palatable.
And again, consider asking what that emoji means next time. It's the gentlest power move on the menu, IMO. Your coworker probably won't recommend you for promotion on the basis of emoji knowledge, so don't worry about that bit.
It's always wild to me just how different, culturally, my straight, politically-moderate colleagues can be sometimes. Making room for interpretation error is helpful, particularly in maintaining sanity.
Horror story wise, I've dealt with awful things from colleagues attributing my recommendations for tool design to my "discomfort with the command line" (not true) to them insisting on three architectural re-designs after a project is already code complete. When I would try to refute their slights, my boss would tell me to stop being disruptive and to focus on the agenda of the meeting. Often, the agenda that I wrote.
Anyways, in my exit interview, I mentioned this to HR, and they said, basically, that that's the kind of thing that a manager should resolve, not HR. Not helpful. But from the company's perspective, three senior colleagues treating me poorly was my problem, since they had Vast Technical Knowledge. (if you haven't read Aurynn Shaw's Contempt Culture/The That Guy Effect, I highly recommend them)
There's a certain level of bullshit in every job. Decide what will make you quit, and what won't. Sometimes you need to work a shitty job for a few years. At least, I did.
To deal with it, I would write down the bullshit that wasn't enough to make me quit (or take a phone video of me explaining it in a private space), and then let go of it. I'd take a little break, go for a walk, maybe get a shower or something to eat... Basically enough to give myself some time to re-set, and then do what I could to continue with my work. Otherwise, I was finding myself unable to work due to being incessantly full of rage.
I would usually review my notes a few times a year and decide if I wanted to quit afterwards.
I did eventually leave that job, but it was a planned thing, and the transition went smoothly.