Yep, I totally get why Life is Strange is certainly not for everyone and leans on the overused trope.
Hell, it's literally not just using it once as the framing for the entire game's progression but using it twice because the motivation for the on-screen relationship/detective team-up is related to a previous instance of the same trope (arguably, I don't think the text ever says Rachel Amber was bi or if that's Chloe's projection) as it is exposed through the series.
It's entirely down to the strength of the characters and performances that I got wrapped up in it. Not only is there as escape valve at the end (yet to meet another queer girl who didn't ride off into the sunset at the end in the first playthrough and then loaded back and made the "right" decision to see the proper ending that the story clearly point to as the thematic conclusion) but also the entire trip has been about loss, love, and even where they intersect (eg alt reality Chloe's request). It's trope-heavy but damn, it got to me. See also Left Behind, same trope, same "but damn it, that was good so I don't care" response from me.
To just briefly go back to Bioware: I think that's why I'm far less kind to the mistakes there - I like many of the games (I grew up on Infinity engine RPGs) and even some of the characters but as a whole, I'm far less moved and so it's far easier to poke holes in the issues because it's not a game I desperately love on that level. Love me some Mass Effect (at least 1 & 2) or Dragon Age (kinda more Origins, somewhat DA2) but it's kinda the wider RPG fun that I'm drawn to there, the worlds and characters I'd describe as "fun". It feels like I'm not bonding in the same way and so I can't look past the issues as easily.