Re: previous anon, I also can’t agree that Thistleclaw groomed Snowfur (except literally, with his tongue, because we know he did do that). First of all, I also prefer them as a battle couple, and think that’s what canon shows, but even if he did abuse or manipulate her, I don’t think he could have groomed her. They were the same age (actually, if we’re being super technical, he was a little younger), they had the same rights and responsibilities in the Clan, and Thistleclaw was not yet at the age to start making plans that he would manipulate her into. On the other hand, he did textbook groom Spottedleaf. Maybe that’s what anon meant?
But in terms of my problematic ships! I put forth Needletail/Violetshine (Needletail largely raised Violetshine and didn’t do a very good job of it, but nonetheless they are lesbians, Harold [well, technically I think Violetshine’s bi but close enough]), the aforementioned Tigerstar/Darkstripe and also Darkstripe/Longtail (mentors making their apprentices’ lives worse in every conceivable fashion), and Tallstar/Shrewclaw (sometimes you and your childhood bully have a weird amount of sexual tension).
NeedleViolet is already weird and unhealthy in canon so it doesn't take much to make it a weird and unhealthy ship. Weird dynamics surrounding Violetshine are always really solid; her entire upbringing was basically filled with bad examples for what family is and a bunch of associated trauma. It's one of the reasons why her and Tree are one of my favorite canon couples because it's her finally finding someone who just unconditionally loves her for her (I mean Hawkwing does too, but family doesn't count. Unless...?)
Darkstripe/Longtail is so funny because I imagine Darkstripe tries to replicate the ways that Tigerclaw hooked him, except Darkstripe has negative charisma and seems very selfish when it comes to intimacy. Probably why Longtail ended up being loyal to the clan in the end, instead of Tigerclaw.