Three days a week is actually pretty common for hybrid setups in 2026, which tells me your company's probably not being unreasonable even if it feels like they are. Before you start job hunting or resign, I'd push back with specifics rather than just saying "this sucks." Ask your manager which three days, whether there's flexibility if you need to work from home on a scheduled office day, and what the actual business reason is. Sometimes there's room to negotiate once you understand what they're actually trying to accomplish. Maybe they need everyone there for meetings on certain days but don't care about the other two.
Also verify whether this is actually non-negotiable or if that's just what your manager's been told to say. I'd document your productivity metrics from the remote period - if you've been crushing it working from home, that's leverage. Some companies will back off if you can show concrete results. That said, if they're digging in hard, then yeah, start looking around casually. You don't need to make a dramatic exit; just see what else is out there. Plenty of companies still do full remote or offer actual flexibility, especially for sound engineering work if that's relevant to your field.
The physical stuff matters too though. Map out your actual commute time and costs before you decide this is workable. If you're looking at an hour each way three times a week, that adds up quick on your body and your budget.