For all I know, Leslie Odom Jr. is insufferably arrogant and people in the industry all know it.
But as an outsider, the only impression I have is that Odom is a polite but proud man who was more upfront about his role in the negotiations for more money with the Hamilton producers, and hinted that he might not be in the filmed performances before something was worked out. That suggests there were some tensions, although the impression I get is that it didn't just involve him (see the Bloomberg story). Maybe the producers didn't want him to continue beyond his year, but he also had other plans. And as noted, Daveed Diggs left a few days after Odom Jr., Miranda, and Soo. Goldsberry is gone. Christopher Jackson is leaving. Every Tony-nominated performer is now gone or going, taking advantage of opportunities.
Odom Jr. said the grind of the role - and it seems like a grueling part - wore him down. So now he has a fan base, he's touring the country on an album tour, he just got a film role, a baby on the way. And oh yeah, he got a Tony and Grammy for being the lead actor in the hottest Broadway musical in decades. Things don't seem so awful.
Moreover, he has repeatedly expressed gratitude for getting the part, and praised Miranda for the complexity of the role, especially as a person of color.
And just as an aside, his performance at the end of "The Room Where it Happens" in the show I attended was my favorite moment of any musical I have ever seen. Months later, I still get chills thinking about it.
So if he's arrogant, he has the talent to back it up.