ooooh okay what do bloodloathing hate MOST about each other. not in like a serious plot- or theme-related way but what’s their biggest pet peeve about each other. (in the toxic hating each other canon universe <33)
ooooh this is a good one....I had to think about this for a while today
I think Legundo would absolutely hate Scott's dismissive and passive aggressive way of talking. "Exactlyyyyy! Exactlyyyy!" And he would be sitting there twitching his eye wondering when Scott is going to talk like he doesn't have some trick up his sleeve for once
and I know you said not in a serious plot related way, but I think this works just enough: Scott's pet peeve is probably Legundo's hypocrisy. I think it's why he starts to mock the Doctor in about 5-6 of vsmp because he knows the Doctor knows that he's being a hypocrite. Of course, Scott is also being a hypocrite, but it still gets slightly under his skin regardless.
another fun option is Scott being peeved by legundo's stage three. like, he gets it that the doc is going through trauma or whatever, but can he at least wash his clothes first before he goes insane? Or maybe find wherever his glass eye went?
you're so real for this. Actually this will solve everything for them I think they should just like kiss all the time woah....

