YES. The ME3 ending was absolutely bad enough, even with the extended cut that they've spent every ounce of goodwill they had and then some. The thing is, the more familiar with ME3 you are, the more complete the destruction wrought by the ending becomes, and even a cursory familiarity with the themes and ideology of Mass Effect compounds that. While the extended cut addresses some of the lore issues, it doesn't address all of them, and it leaves the thematic problems in tact. The god Child's logic is still idiotic to the point of farce, the outcome is still brainwashing, genocide or soul-destroying space magic, Shepard still can't ever be right about the galaxy being worth saving in it's current form.
The Mass Effect series is broken on a fundamental level now and every second anyone spent on it is ultimately wasted because even the intrinsic satisfaction you can get from saving the galaxy is all for naught. That's a hundred hour plus campaign spanning three games that amounted to telling the player "you suck, and everything you thought was right is wrong". That ending is incredible in it's level of failure and the fact that the extended cut barely changed anything (except making control more viable) means Bioware wanted it that way. The ideology of the entire series is Bioware telling you, via their God-child mouthpiece how wrong you are for ever believing any of the idealistic nonsense that Shepard and his allies stood for.
For example, just a few of the messages that the ending delivers are: Robots are inherently evil (God-Child's premise, which you cannot argue against), unity only makes you easier to exterminate (refusal ending), people are inherently too corrupt to save themselves from extinction (not listening to Shepard prevented conventional victory) and you can't ever win against something bigger or stronger than you, only negotiate the terms of your demise (all endings). The entire series you're set up to think these things are all wrong, but the ending, which again is narrated by the writer's mouthpiece, tells us in as many words otherwise. The entire series is just so counter to everything remotely hopeful in the world it's depressing to think about.
And you can make a series like that work - Game of Thrones does it from what I've seen and people for some reason like that, but it's never been done in such a way that you're set up from the start to think the message is something different, and that, in a way makes the betrayal of the player's trust that much worse.
So let's put it this way: When Joss Whedon kills off your favourite characters it's sad, but it's for a good cause, and you know his heart is in the right place so it's worth seeing more of his work. Bioware did the same thing, but they're either so cynical or so inept that I have no desire to experience anything they make ever again. No matter how much I enjoyed the build up, it has to serve a deeper meaning or the entire series is for naught. In this case, the deeper meaning is something I just don't want to be a part of, and that does retroactively taint what came before, because the ending is the capstone of the entire series - the point everything's been building up to. The ending more than anything determines how the game should be interpreted, because it contains the writer's extrapolation of everything that happened up until that point.
And yes, after Batman and Robin, I'd never watch another Joel Schumacer Batman film.
I always feel melodramatic when I talk about Mass Effect now. This is what paying attention in English does to you - you start to understand the writer's intent in fiction, and it ruins your unironic enjoyment of things with bad writing.
