I don't get how Mass Effect 3 was a bad game (major spoilers)...

[Darc Requiem]

Dr.Henry_Killinger said:

Having played Undertale and looking back at ME3, it was fun yeah but two of the critical points, player choice and dialogue felt half-assed for the series.

Choices were more about collecting resources rather than player agency, which went against the entire series. That being said they could've still redeemed themselves but  the ending hardly even addresses what you've spent 90% of the game doing.

On the pros side, it was a polished ME2 in terms of combat, and it really shined at the beginning.

ME3 had excellent gameplay. It was an interesting dichotomy for me. I loved the story of ME1 but the gameplay became a bit of a chore after ME2 released. ME3 was the opposite. The gameplay was awesome but the story was hit or miss. I've never seen such an  uneven game. The highs were exceptional the lows were awful.