Steve has chilled quite a bit about the 80's situation, but IMO he has a lot more reason to be less-than-happy about it, and I'm not sure what "being an asshole" about it would really entail. He badmouthed the band, but has since publicly apologized to Rabin and the others for his comments. He plays "Owner of a Lonely Heart" every night because it was the band's only #1 hit, even though he really can't stand the song. Compare this to Jon Anderson, who outright refuses to perform any Drama songs, because as far as he's concerned, those are not Yes songs because he wasn't on that album.
Yes had officially broken up after Drama. South African guitarist Trevor Rabin meanwhile was putting a band together with Chris Squire and Alan White (currently without a gig) which was going to be called Cinema. For keyboards, they got Tony Kaye, who was the original Yes keyboard player, even though it had been over 10 years, and Squire called Jon Anderson to help write some songs. Now 4/5 former Yesmen, the suits pressured Rabin into calling the band Yes for marketing reasons. Rabin caved and agreed to call the band Yes because he wanted to break into the U.S. market, but he has since expressed regret that he didn't stick to his guns. He knew he'd be accused of changing the sound of Yes, and catch shit for daring to replace Steve Howe on guitar, and that's exactly what happened.
Meanwhile, Steve Howe is out there working on solo stuff, and hears about the new Yes and wonders how that happened and he never heard anything about it. Last he knew, he was the guitarist for Yes, and had been since The Yes Album, but a new Yes had formed somehow, without him, based around this unknown guitarist. Yeah, I'd be pissed, too. If I had to guess, I'd say that was a big factor in him wanting to buy a piece of the Yes brand name, to make sure that never happened again.