Willingly choosing to leave your company because you don't like how your 50:50 partner is behaving is not 'losing' your company. It's giving it away. Let's face it as well, in any small startup, losing 1 of your founders is often the death knell. Especially if you're going to walk off with half the money. It doesn't sound like the company he left really lasted long after he left - it's got a website with no updates since 2015.

This article also shows a real lack of self-reflection and judgment. There are lots of lessons from this story and 'have more equity than your partner' is not the most important one. Thousands of startups fail because of inter-founder dynamics, there's lots of interesting stuff to talk about there. But if your approach to that is 'have 51% and vote my founder out', then your attitude is wrong.

Also, don't spread gossip on the internet about your cofounders! Now anyone who you consider partnering with in the future knows that if things don't work out, you're at risk of spilling their personal lives on the internet. I know that would be a red flag for me.