This story is pretty much made or broken by how much violence you can tolerate from a violent tsundere.  For me, it was kind of funny at first but it started to wear thing.  I do think the ML needed to do some pretty heavy apologizing because his behavior was, ultimately, pretty manipulative, but I also completely understand from his perspective with how irrationally angry the MC reacted to everything, he had a legitimate reason to fear that if he told the MC he'd been misunderstanding things and tried to clarify, the MC may very well have cut him off completely to cover his own shame.
The MC's backstory was sad and my heart did hurt for him but it also ended up being used as a vehicle to enable his frequently violent reactions to things and the ML just being like oh he's been so unloved and he's so cute I will just forgive him literally everything.
So yeah.  There were parts of this story I enjoyed but it did start draining on me after awhile and this relationship is definitely toxic being presented as something loving.  I did read almost the whole thing though I peaced out in the extras because it was just an excuse for more irrational tsundere behavior and what little character growth that the MC was thrown out the window so we could have "funny" violent misunderstanding shenanigans.
I'd read a whole story about the side pairing though.  They seemed cute with minimal landmines.