I hate romantic subplots.
Not because there's anything inherently wrong with romance, but mostly because the vast majority of romance does not cater to what I think of as attractive/good relationship, so most of the time it just ruins the rest of the IP for me. Like, your usual love interest in a straight romance is actually kinda gross by my standards so I can never sympathise when the on-screen characters are like OMG HE'S SOOOOO HAWT. Like, I have a hot partner of 11 years. If your love interest is not hotter than the real person who sleeps next to me every night, don't try to sell this stuff to me. I legitimately had to put a highly-recommended book down because in the first 30 pages the female character (who is SUPPOSED to be a distinguished mission commander, but whatever) just keeps gushing about how manly and scraggly this guy is and I just kept retching every time she added another descriptor. Oh he's SO MUCH OLDER AND GROSSER-LOOKING THAN ME, TAKE ME AWAY, DADDY! Eugh. Gay/lesbian romances are a little better sometimes because they usually don't feature the nuclear waste pile that is heteronormative standards, but then that brings me to point two...
....Maybe the love interest could be physically attractive, but the way the two characters handle it is absolutely repulsive. Maybe it's toxic, maybe the characters act like toddlers and not the adults that know how to speak that they're supposed to be, maybe the woman(in a straight relationship) is too passive/submissive. Again, it's just cause for frustration and can ruin the rest of the property for me.
So... In theory I'm all for romantic subplots because I like the idea of attractive people getting it on as much as any normal human being, but in practice most of them tend to be an annoyance because they're just not done well.
In my own writing, I do add them if they're natural, but I think on the whole platonic close friendships can be just as interesting of a narrative device as romantic relationships, so I only go the romance route if it actually makes sense. And I greatly enjoy adding already-established romance, like two people who have been together for a while and work well together.