You fell in love with a game and it's characters, sunk hundreds, maybe even thousands of hours into it. It became a comforting, immensely satisfying part of your daily life. Then you heard a sequel was coming and got really hyped but when it came out it was utter rubbish...
The concept makes a lot of sense and was really really cool.
I saw a playthrough and I had 3-4 problems:
everyone seems to be better at colonizing on their own, separate from the home base, whose literal only purpose is to colonize.
(mechanically the whole colonization thing is trivialized by mary sue story progression and deus ex machina devices)
all the new aliens are once again roughly 2m tall humanoids
the ending felt... very "we need setpieces" and "absolutely make it a parade of every minor character we talked to"
ME1 even had Rachni, as non-humanoid npcs, could have something like that...
(And obviously most parts of the art departments did their job well. Hilarious but not game breaking bugs were the exception to the rule. It's 99% a direction and writing problem.)