Two years ago, I experienced Sudden Sensorineural Hearing Loss (SSNHL), and am now almost completely deaf in one ear. This year, one of my colleagues had the same thing. Now I see there's a study out showing a strong correlation between COVID and SSNHL.
I guess that explains a lot. But, shit.
BTW If you find you suddenly lose hearing in one ear, get yourself to a specialist *immediately*. You have a 24-36 hour window to save your hearing before it becomes permanent.
https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(24)00338-9/fulltext

@steve This is shitty. Sorry you're experiencing this.

Might have been what happened to our younger son when he was ~5. We went to the ER immediately, they couldn't find anything, but sent us to ENT who was convinced that he was making it up (too young to have tinnitus or hearing loss). But as it didn't get better, we saw some specialists. No idea why, but he had lost nearly all hearing on his left ear. Got a cochlear implant 3 years ago, which helps a lot with all the problems you describe.