I was in a similar situation a few months ago, in a job that started out amazing but got worse and worse with new management and processes. I quit eventually, after all my feedback was ignored (and even covered up) for months.
Four months of unemployment later, I was almost bankrupt, but it was still absolutely the right decision to have made. My mental health would not have survived much longer.
Now I'm in a much lower paying part-time job at a smaller company, but with a wonderful team that is passionate about what they do and supportive of each other. We're very user-focused and not C-suite ego driven, and it makes all the difference in the world. Tons of consumer interactions, minimal bureaucracy, no overbearing stupidity from on high. It's a night and day cultural difference from my last job, which was cushy but joyless. I'm really happy in this new setup (gotta get more hours soon though, lol).
Life's full of tradeoffs. I could've easily coasted, but I signed up to make a difference, not check boxes. I made the decision to quit, it hasn't been easy, but it was absolutely the right call and things are getting better every day. I'm actually excited about work again.
Side note, you mentioned batteries and inverters? My last job was with a mid sized solar manufacturer Who frankly wasn't that experienced with tech work and tried to clobber together an ecosystem from different small acquihires. It... was messy, to say the least. I've never worked for a more inefficient company, in terms of bureaucratic nonsense and worthless planning. Maybe it comes with the territory (old school manufacturing vs modern software companies)?