My opinion is support the games you want to see more of, and don't support the games you don't.
Mass Effect is one of my favorite fictional universes period, so even if Andromeda was a flawed lukewarm game, I think most of the people bitching about said game would sure NOT want the franchise as a whole to die.
But I mean if you don't want to support microtransactions or dlc and whatnot, you may just have to quit AAA gaming or buy "game of the year editions" because it's not going away. I totally understand your concern, but as scummy as it is, it's not going to make me not enjoy a new mass effect game, or a new street fighter game.
Now if it was "my favorite franchise is now FREE TO PLAY D:" then yeah, I won't bother with it because that business model directly gets in the way of my fun. Plants vs Zombies 2, the puzzle quest games on mobile, I love the games that started those franchises, but I can't even for 20 minutes enjoy them in a f2p form. I WANTED TO LIKE marvel puzzle quest, or the magic the gathering version, but limiting my play behind a paywall...when all I want to do is give them a flat $20-$30 for the damn full game to begin with, is frustrating.
I think f2p ruins games more than micro-transactions do, although, it depends on the severity.
It sucks, but I kinda accepted it years ago. Even Street Fighter 4, the lovechild that spawned a rebirth of fighting game popularity...there's a shit ton of dlc costumes in that bitch, remember when that stuff used to be unlockable or just free? Well we just don't live in those times anymore, it's what it is, and instead of getting mad about it, or protesting games (dude seriously, it doesn't work unless it's a massive shit smear campaign like andromeda received) I just buy what I like, and anything else I don't often waste thoughts on. B BATTLEFRONT 2 MICROT-don't care, not getting it, next.
The games market is so damn bloated now a days that you could never touch a AAA game ever again and still have too many good quality games to play before you die.
*edit*
Now that I think of it, why is Andromeda even on this topic? I can understand the public perception of the game, and it wasn't as quality as the original trilogy, but there was no significant dlc or microtransaction crimes in that game (besides multiplayer which is garbage so don't bother) so I am a wee bit confused. If anything it sucks they didn't expand the game with more DLC because the end of that game sure as hell makes you want more.