So yes. They are not only not your friends, they're outright hostile and you should trust nothing they say and approach every interaction with them as a game and try your best to at least break even.
They likely view you with deep contempt and derision, if they acknowledge that you have any measure of self worth at all. You should act accordingly.
Have you been in companies of more than a few people? Being "CEO, CTO, CPO and founder" of a startup of 5 does not count as "being an executive", right?
I’m glad you’ve had a better experience. Sometimes the best among us do percolate to the top. I’ve seen it too, I’ve just seen the opposite too many times to trust anyone in an executive leadership role.
Find life satisfaction from other sources is my advice, but not corporate world and career in such. Thats a sure sign of life wasted on many levels.