To be fair, mass effect 2 already threw a lot out the window in terms of there being any kind of planned trilogy arc script (ie Karpshyn's planned dark energy idea which you get a trace of from Haestrom in Tali's loyalty mission, and then kind of dissapears into nothing), instead deciding to be a spin off in the middle of a trilogy with hugely disappointing plot progression following the first game, so what happened in 3 is kind of inconsequential after that.
Well, it was more in reference to the star brat coming out of left field because it was the writers "artistic integrity" to produce "art" at the end (as well as telling players afterwards when the ending was clearly not right, that it's the players fault for not recognising the greatness of their art), as well as removal of everything which put the players in the game of Mass Effect (we have every choice right up until last few minutes), destruction of relays "because it looks great!" vs established lore (destroying those relays blows up the system and nearby ones too as seen in Arrival DLC for ME2, and we just blew up the WHOLE network in the WHOLE galaxy...).
So with Rian and Lucasfilm. There's no problem, it's just you who don't get the films greatness. (First point; "Artistic Integrity", nothing wrong here, move along you plebs...). Then there's throwing away of certain types of lore just to make their own stuff come across better but fails to explain it's actually "different" within their own medium. (Blowing up relays kills everything in the system, but was never made clear in original ME3) But hey, let's Hyperspace into everything, and not only that, Force Ghost fights everyone!.
Anyway, the key infuriating thing is the "Vocal Minority" thing that is being thrown about all the time. And how it's been handled. It's identical to how Bioware handled ME3 ending and that's what I'm primarily about. And some of the stuff above is where you can sort of see the relation between the two franchises. Tired, or I'd write this up better, but it should be OK enough for people to see the relation.