
Could you recommend any Isekai, guideverse, hunterverse manhwa? I read almost all of popular ones

These are mainly reborn or transmigration:
I Have To Be A Great Villain
Monochrome rumor
Should I Write You a Love Letter Instead?
Stuck in My Sister's Dating Sim
How To Survive As A Player
Don't Offend the Male Lead
cozy obsession
A guide out to succeed
I was Reborn as the Villainess' Father and I Need XXX to Survive!?
The director who buys me dinner
Shadow crown
Guide/Esper world:
B-class guide
How that guide is loved
a guide out to succeed
The promise
Rapport
Guiding hazard
Ordinary person A
99.99% lovers
The hunter wants to live quietly
The S-Class Guide as Sweet as Honey
Senza Replica
My half baked esper (hate the guide here tho T-T)

Do you guys know straight incubus manga or manhwa? I realize I never read one, either they are bl or just succubus

Yes absolutely https://www.mangago.zone/read-manga/the_mischievous_incubus/
How many times did you read for threesome and end up crying for second lead?
I literally skip those stories so fast. Sometimes it is enough when the author has 3 people on the cover and it seems ambiguous, I just spare myself. Although, it doesn’t always work. Found out with one manhwa that even tho there are 3 people on the cover, one of them isn’t even a love rival
1 time and got cured forever, love triangles are definitely not my cup of tea