About Rosa - it doesn't really matter if Max and Co did it to Rosa because her car was there or whether they intended to set up the only PoC - the result is that not only was Rosa branded a murderer, but there is the whole added layer of racist hate that her family has had to deal with since. She has every right to be angry about that - whether Max and Co intended to be racist or or not. I don't think they intended to be racist, but intentions in this case just don't matter. Their white privilege blinded them to how this would play out for Rosa's family. I still empathize with them (well, based on my love of the OG characters) but it was still an awful thing to do.
Especially since there doesn't seem to be any urgency that they need fear. That Alex's dad never locked them up even though he's known who they are all this time makes NO sense except CaM didn't want the story to have any urgency.
Which proves she doesn't really get Roswell, imo, but whatevs.
Michael and Alex. This relationship keeps confusing me because I think CaM retconned them a bit from the pilot. Plus, the way they started off in that adversarial way that I think was meant to be angry-flirty but just read as angry has bothered me from the beginning. Well, that and the fact that the whole "cosmic" thing felt forced and unearned... and that typically that goes with Max and Liz and I didn't appreciate CaM snatching what made Max and Liz special in both the books and the OGshow and trying to force it onto Michael & Alex when it just doesn't fit them. I STILL don't know why they are into one another. I kinda almost get it with Alex - because he's such a puppy dog and he clearly got the crush on Michael when they were younger and they bonded a bit over music, but ... that's it.
CaM still messed up Max and Liz too and honestly the one couple she got right has been Michael and Maria - which was established in the books and OGshow - she got super lucky that Michael V and Heather H have INSANE chemistry - but we already know it's for naught and that Michael and Alex are going to be endgame even though I still feel like their whole story is forced. Maria is being set up to be the "safe" choice and when she finds out about the aliens, her overreaction is likely to mess up anything she could have with Michael. It's too bad - M&M are honestly one of the saving graces of this show for me. I love their banter.