Yes.
They turned a deep, galaxy spanning RPG into a pot-hole riddled shoot'em up. Now, I'm not saying having lots of shooting in your RPG is a bad thing, but when that's the only thing it has going for it, that's when I take offense.
I thought ME2 was a good game, if a bit shallow and carrying too many of the scars of committee design and a publisher breathing down their necks. Otherwise it had solid writing and an awesome endgame.
ME3 funnels you down a narrow corridor and doesn't let you out. There are plot holes you could drive a Reaper through, there's no satisfaction to be had in completing the story and gathering assets, because it all amounts to jack shit in the end.
The series was mishandled, and unless they're going to write the new mass effect games as elseworld stories where, I dunno, the Council declares war on us and be become a rogue nation, then maybe. Otherwise it'll just be a colossal waste of time.