I feel for you, man, and everyone in that position, I really do.
Like I started binding at 14... I was already big-chested back then! Later on as an adult once I got fat I stopped binding. After years and years doing it I was just so sick and tired of it!!! It was painful/uncomfortable as hell!!! And maybe I thought something like, 'I'm gendered female anyhow so what's the point'. So I strarted using too tight sports bras/tops instead. They were better than none - but I had visible breasts.
Now I have a layer of 3 tight sports tops plus a back support that do the trick. I only wear that back support outside though, not at home. It's just too uncomfortable. It flattens my chest alright. But with just a T on there are visible lines etc. and it doesn't look that great. But under a hoodie it's alright. As good as it gets, at least!
But, so... I had/have HUMONGOUS chest!!!!! Like HUGE

!!!!!! Thanks, genetics. So it's extremely difficult to hide entirely with anything. Layers, and open jackets, vests etc. help. I'm about to order an underworks binder though. Maybe the result will be better, hope!
I used to bind down and out for years... Well that caused the tissue to really droop. It was also painful af. But since then I'm able to do pretty much anything with them so... They are not that sensitive. Though after binding etc. might be a bit sore. Again.
Now I'm binding more up/against chest. The first 3 sports tops create that uniboob effect... Then the back support will flatten it against my chest. Like I said - the result isn't perfect, but at least I don't have boobs now!!!
So, how did I manage to unbind

for years? Well... I just tried to ignore it the best I could. I was unable to bind - so I didn't bind - so I had to continue living regardless. It didn't kill me - but it didn't do good to my self-esteem either... Didn't really feel like socializing! After this new DIY method my confidence is up 100%! The biggest incentive on losing weight for me was to be able to bind again...........! But I still don't use that thing around the house or while exercising at home, which does make me feel a bit dysphoric. Seeing the chest (and being aware of it) does dampen my mood very easily.