This movie was actually extremely cathartic and helpful to me, even though it addresses deafness and not tinnitus. There are going to be spoilers about the general direction of the plot in this comment, although I won't spoil specifics.
Riz Ahmed's performance of someone who is trying to keep up the facade of self control in public while freaking out and crying in private reminded me a lot of my onset period with tinnitus. The first hour or so was practically a horror film with how well it captured that feeling of helplessness that comes with your reality and perception of the world changing so suddenly. It captured that feeling of isolation perfectly.
The catharsis of seeing this character learning coping mechanisms and slowly coming to accept his new reality was an awesome emotional payoff. I even tried the "sit in a room and do nothing, with just a journal in front of you" tactic and it helped me a lot to de-stigmatize my lingering fears of totally silent rooms. Some of it may be fantastical and emotionally glib, but it was a pretty good pick-me-up to emotionally identify with a character and watch them go through the process of accepting their new reality.
I would only recommend watching it if you are comfortable enough with your tinnitus to be exposed to some seriously traumatic scenes of a character reacting to sudden hearing loss. That first act was so stressful I considered turning it off, but I'm glad I didn't. Quite possibly my favorite movie of 2020 (not that the selection was super bountiful compared to the awesome 2019).