Peach's criticism's of the ME series aren't without merit. The story and depth kept me glued, but it's not a superb game or series on every front. There was never a moment where I was in awe of the combat, for example.
AC's criticisms I have a bit more issue with, only because the first game is clearly flawed, but the sequel directly addressed most of the glaring issues of the first, and by all accounts the 3rd has as well. It's a classic example of responding to feedback without overreaction, which is commendable. If you don't like the series, you don't like it, simple as that. But I find it almost objectively false (or as close as these things can come to such a label) to say that it's not a well-made series.
I have no clue how you're not into the metastory though, Peach. I'm not into conspiracy stuff just for the sake of it, but the world they're creating through the story is riveting imo.