Basically it turned out Ioan was supporting a fan website (it had loads of great content on it, not just a forum, it was actually pretty well known, I knew of it without being really a fan at the time) for 2 years in secret financially. It definitely massively boosted his career, so well invested money (think his agent adviced him to spend into it too)
Then one day somebody made a joke about one of Alice's movies winning a Christianity/family award, saying that the judges probably didnt saw some of her more racy stuff from her early days. Then some days later Ioan stopped supporting said site and sent an angry letter (which is why it's hilarious that she now claims that he did nothing about it to support her lol), site went down without support. Since then his career is nosediving, although it sorta recovered in recent years.
I was only occasionally lurking but I never noticed anything nasty, the most people did there was mildly joking about her fashion choices. Before the site went down she also got a mod removed because she was certain that they were behind some nasty wiki edits on her. Those likely came from members on their imdb board: Alice regulary got in fights over there (she denies all this, but it was so obviously her, the same post and delete tactic, writing style, and saying things like "why would Alice Evans be jealous, she has Ioan every night inside her")
You could of course say it was all within their rights to not pay anymore for it, and I agree, but how it went down just seemed silly. And was probably the biggest red flag of this relationship.
Maybe those who were actively on there can give you more insights, but this was my perspective as a third party, but here have a more extensive summary:
https://ohnotheydidnt.livejournal.com/12026293.html