This one is essentially a battle shounen with ecchi moment. So it make more sense to animate this than some outright ecchi one without any subplot. Plus, we used to animate stuffs like to love ru which was full on fanservice.
Some of them already kinda divorce like the first one. Some just outright cheated like the cat girl. Some just enjoy doing lewd stuff regardless of who they target, like the super girl, the tentacle girl or the slimy girl. None of them really show any sign that they don't like their husbands...
She can solo the whole hero's team on her own, lol. Unlocking her teammate power is just a way for her to have more fun, lol. Heck, she most likely doesn't care about her teammate power up cause none of that ever happened because of her.
I know he "technically" didn't cheat. That's why i put cheating in a basket. The problem here is that he need outside help instead of relying solely on his abilities to win. That's why it's such a bad ability for normal people
The skill was legit bad. It's not just because the users aren't bright. Remember that Mikagami despite all his cunning scheme barely manage to win his fight. Sometimes he even have to "basically" cheat to win.