Well, maybe I’ll be wrong, but from what I’ve seen in comments here and there in various places of the internet, I think it’s just that some had difficulties with certain things where he was concerned. For example, even I had a problem on past runs where he would act as if you had flirted with him at the party, when I hadn’t. I think it was just a bug problem or something, but still. Then the fact that he is the polyamory option, which might not be to everyone’s liking. The fact that some people didn’t like him interjecting when talking to the Drows in the brothel (and subsequent small drop in approval for certain love interests when refused there). Like he would be trying too much to get in people’s knickers, in people’s relationship. I mean, I can get that kind of reaction, I guess. But for myself, personally, I don’t feel like that. In other runs I said I was not interested and that was it. I had him in my party when talking with the Drows when I was romancing Astarion, and it was not a problem because my character was not even interested in what was on offer. Which is maybe quite anecdotal, since based only on my experience with the game. I think the mechanics of the game and such play a role in the short comings of companions and other characters too, so I also try to keep that in mind. I liked him within the romance, or as a possible companion elsewhere.