It is important to deal with this, I would suggest getting a number of people to support you then setting him down because this will only get worse. If you lea

It is important to deal with this, I would suggest getting a number of people to support you then setting him down because this will only get worse. If you leave you will not get any benefit from the company and your investment will shrink as more investors come on. The only way to keep your investment is to stay in the company (or try to get bought out of the company). You should get him replaced. No matter how good he is, he is trying to ruin your life and that is enough to get rid of him asap.