Wow, the review titled "Manipulative and Toxic Corporate Environment" is SPOT ON! I would support every single thing mentioned. Everyone I know who has quit left because of the CEO. Everyone. Several have even left with no job lined up. It's a tiny company so there's no avoiding him.
He's also very clever, manipulative and we've had to question his ethics sometimes. Once he realizes you're not superhuman, he will find every little thing wrong with you and your work to drive you out of your mind and the company (probably so he doesn't have to deal with unemployment benefits). Even when you call him out or catch him contradicting himself, he'll steer criticism back on to you.
Here's where I bring in the term: gaslighting. Look it up if you don't know what that means. A co-worker at the time introduced the rest of us to it and we all immediately agreed this is what the CEO does. Even being fully aware of it, I still fell victim to it. By the way, he's infamous for overly harsh emails and he poorly hides his gender bias.
I could write an extensive paper here with more warnings and examples, but in fear of identifying myself, I won't.
TL;DR Don't work here. If you're currently working here, find a job that pays you and respects you more, then quit before he rips your confidence apart. We all deserve(d) better.