Stay in toxic job for payout or leave for peace?

I (28M) have been working in a business for most of my 20’s and I have found myself being burnt out, with no motivation to grow the company anymore.

Basically the owner of the company is bi polar, abusive, a narcissist, and is extremely difficult to work with. He makes terrible decisions daily and is basically sabotaging the business by his incompetency and how he treats people. 3x people left the business last week because of how he is, and I just can’t find the motivation anymore to grow the business and ‘get it back to where it used to be’.

Here’s the dilema I have, I own 25% ghost equity of the company which means I will get a payout of 25% of the sale amount of the business. It’s currently worth €4m but we are pushing to bring it around the €8M mark, in which I would get €2M before 52% tax.

I have CPTSD and I’m in a freeze and burnt out. This isn’t just from the job, it was from before the job, but the job has forced me to keep it away, so I’ve basically been stuck in a freeze for 7 years or that, with barely any emotion.

Each year im grinding it out, with the hope that he will sell, but he’s not budging, he’s saying now another 2 years. I cannot work with this guy for another 2 years and I don’t even trust our agreement, I’m lacking motivation and I just want a life that is peaceful, and not a rollercoaster each day, of bad decision making, shouting matches, 6 hour long teams calls just listening to him speaking.

I have 300k worth of stocks saved and 30k cash in the bank and have just bought a house, so I would be fine for a few years. But the carrot dangling in front of me is saying hold on for 2 more years and create generational wealth. His indecisiveness though, tells me he won’t sell in 2 years, because he’s been talking about it for the past 3 or 4.

He said I can have 3-6 months of paid leave off, but I kinda want to just cut ties and never have to be associated with him again. He told me yesterday that I was “going crying” to him about me being burnt out. And it’s just slight condescending comments to me and everyone else in the team constantly, everyone is drained.

One of the people who left last week was another director, they left because of his constant calls and abuse , constant arguing and accusations. But they didn’t have the ghost equity like I do.

What do I do - I am craving feeling emotion again and feeling connected with the world. I feel like I need to put my energy there. I’m afraid though that I will regret my decision as the monetary gain could be huge.

Basically at the moment he’s giving me the door that I can walk now, or take time off, but I just don’t want the thought of having to come back here after the 3-6 months.

Any help is appreciated.