Many times, people’s decisions are wrong, but they have the authority to decide. Maybe they should change, but arguing with them won’t help once their decision is final. You can’t change others, but don’t quit.
Be a boss, fix problems under your control—everyone has some. Start new things, inspire people, or publish your dissenting opinion somewhere useful. Just, accomplish something.
Music lessons for pigs are annoying and achieve little. If you try to teach pigs to sing, consider that you might be wrong and your boss has accepted it and already moved on, which is why he’s the boss.