You’re in the ballpark with that stuff, but you’re also significantly off on a lot by my readings and understandings. For example:
Shatner’s co-stars were annoyed with him not because he was rude to them per se, but because he was a line-hog, which could actually cut in to their future opportunity & salaries because they had less content online via ST. I’m not trying to excuse that, but let’s call the situation for what it is, and let’s also not forget that he took ownership of that later on, and had good relationships with Nichols, Kelly, Nimoy, and Koenig, with Takei and Doohan scorning him.
Yes, he was arrogant, and I believe always was, but so are a tonne of leads, big stars, and very talented people. Yes, in an ideal world it wouldn’t be like that, but… what are you going to do? Reinvent humanity?
He and Nimoy did NOT hate each other for any significant years AFAIK. In fact from my readings they clashed early, found a way to work it out, and were in fact fast friends for many decades until they had some kind of falling out late in Nimoy’s life. Please let’s not get it twisted, dude.