Some version of that could be true, but it's a lot of baseless speculation. There's nothing to indicate they were unhappy, that he was controlling, or anything like that. The friends that have commented have been surprised and shocked... nobody has said "he always seemed off" or whatever.
Having said what you said... it would be interesting if anyone could find their social media activity BEFORE they got back together.
Her tweets from 2013-2015 are normal lovey girl stuff. Then 11/7/16 she says "I'm finally happy and that's all that matters " which doesn't mean him but idk. Then its dark until 2017, then dark again until 05/20 for one tweet, then 02/21 for two tweets and last tweet of their tent at Zion on 07/18/21.