"For my friends everything, for my enemies the law"
My own tired example "half of the fraud" is fiscal management: one-half focus only on income (via raising taxes) and the others on cutting expenses. No successful family or company does fiscal management this way. It's both sides, and it's even deeper than that: usually we need to re-assess the priorities which underpin expenses and taxing strategies. And fix those too. Heck, the GOP has even given up on talking the talk. Not even that is around anymore.
Like other commenters here outrage isn't an answer. Yes, it's the present currency for talking heads on TV and crap talkers on the radio. Like a Woody Allen movie without the humor or intellect or pretense of trying, each side tries extract more outrage, more anger, and to guilt the other side into change. It's stupid. As one corporate owner put it (paraphrasing) Americans prefer to be entertained than to deal better with the truth. So we play into this.
Why outrage? Because we have no agency in the present. We gotta fix that.
MLK had two easy outs: give up beating a dead horse, and open a barber shop or preach. Or payback. He, thankfully, chose the middle course. The middle course in America will travel through both political parties re-examining their political planks, since without them, they are lobbying fodder.
* The Man Who Was Thursday, by GK Chesterton
* The Oresteia, by Aeschylus
* Cyrano de Bergerac, by Edmond Rostand
* The Eye of the World, by Robert Jordan
You said it yourself, you've grown hugely, you're dominating SEO since you joined, and built loads of products. This is your 'partner' getting greedy after you've done a lot of hard work. It wouldn't have happened without you. Don't undersell yourself.
Your 40% is worth $400k based on that initial funding valuation, right? Assuming it's as successful as you seem to be implying, it is almost certainly worth more now.
Everyone is telling you to roll over but seriously, fuck them. This other toxic guy is the one who should be getting pushed out, not you.
The other investor ultimately has power in this situation, not you or him, so whoever convinces them that they are the person to go with gets the seat and gets to continue with the project.
If he has a good relationship there you're probably fucked, but results matter... and if you can prove you've done great stuff since joining and and have great plans for the future, he can be replaced.
To be clear: this guy has decided to blow up the project so he can get a bigger share, if it all fails now he can only blame himself.
That's positively hilarious in light of some of the dogs that investment banks have knowingly foisted on the public.