Yeah it was fun in the beginning, after all who never thought about being transported to another world where you ate a big hero with swords and magic?
But what the hell, I'm pretty sure there's more isekai now than other genres/settings. It's gotten to a point that if I see the tag I just move on.
You should check out Spellbinder. It's a live action Isekai from the 90s produced as a collaboration between Australia and Poland. There are no romantic themes except for a subplot where two characters pretend to be in love for plot reasons and they both absolutely hate it. Also the "love" is entirely age appropriate.