The tensions go all the way back to the post-Doom (1) era. Carmack wasn't blameless either. Here's a fun war story from Sandy Petersen: https://www.youtube.com/watch?v=G_ga1TFBrBo .
Yeah this is a curious dichotomy. Universally hated from the outside but beloved from the inside. It does seem perhaps a little cult like though, the median tenure seems incredibly long - people join and _never_ leave.
Yeah, but Oracle is much better at it. If Zenimax really wants to compete with them, they need to be sending license auditors into my house to count the number of occupants as potential users and send me a bill for their use of &/or gaining of enjoyment through watching me play their games.