(These aren't really romance stories, but maybe these? I haven't read some of these in a while/caught up with some of them, but from what I remember the mc's stand up for themselves and for the most part, don't tolerate being treated like crap by other people.)
Clover (tetsuhiro Hirakawa)
I Became the Male Lead’s Adopted Daughter
Weak Hero
Damn Reincarnation
Kiichi!!
thank youu!! i was in the mood for romance but i might check these out
Yeah, I didn't realize you were probably looking for romance until after I had already typed out the list lol. I hope you find something you like though!
Do y'all know some stories where the MC knows their worth, like if the person they like is treating them like shit, they do not tolerate that treatment?