People need to learn that tropes are just writing tools. If out of the 10 or 15 major genres you only mainly read 3, and then you mainly read ones with ecchi in them, then you've massively narrowed down the variety of authors you are going to come across.
Do yourself a favor and think of any ecchi comic's writing as basically a cartoon in paper form. If you don't like borrowed humor/storytelling/character archetypes you really should limit yourself reading this kind of manga. I've been reading manga for 15+ years and I promise you it doesn't go away.
Also, cyclical plots are a very, very Japanese thing. If you've never heard of The Disaster of Saiki Kusuo I suggest glancing through it, it is a parody of shounen storytelling and one of it's most overarching gags makes fun of this. If you want something super unique you'd be better off going to light novels, because manga is a mass produced and (mostly) weekly product maintained by readership and publisher opinion rather than how unique it is.
Knowing you internet people when someone says "But this product had X sales!" you proceed to talk about how sales does not equal quality. Well manga stays in the magazine only if it sells, even if it is hot garbage. My personal biggest offender being opinion alert Kimi No Iru Machi. That is the kind of product you are dealing with, so I suggest you adjust your standards accordingly.
