Get a business partner. One who doesn’t take any shit, put them on a profit share and let them loose on implementing standards and discipline amongst your employees. You meanwhile, take your lovely demeanour and be the customer facing side of the company. Me and my brother have run like this for years and it works. He’s the nice guy, I’m the arse kicker. Play to your strengths. Believe it or not, being a nice guy can be a major strength if you play it right.
I think you can say you gave it a good shot but if it’s making you unhappy, it’s never going to be worth it. You need to at least like the majority of the time you spend working. Cash out if you can mate, life’s too short. Good luck with everything 👍🏻