I dont know man, I really dont see what you're seeing at all(speaking as to games as a whole). Yea, we get more 'serious' dialogue nowadays instead of the days where developers just didn't really even try that hard, and yes, this will fail sometimes. But as I said, overall, it's gotten better in the process.No, the kind of crap we see today is something different. Its like the writers are taking down to you, characters arent belivable, theres no subtitlity, theres no room for moral gray areas, its preachy, and every single "joke" falls flat. Apparently just calling someone "lug nut" is funny to these people.
Sure, many games arent very deep, but they were still fun. Sgt Johnson from Halo isnt i very deep character, but he´s a fun character as opposed that super anoying, melodramatic winy pilot from infinite who I just wanna shot in the face with a rocket launcher.
I played mass effect again pretty recently. Its lightyears (pun intended) ahead of much of what we see today. Characters are belivable and likable. You get the impression that these people are experienced and competent leutenants, scientist, soldiers, crime bosses etc. Often there are gray areas with no clear right or wrong, instead of the protaganist preaching to the player what the moral correct thing to do is.
There are exceptions of course. I thought psychonauts 2 had excellent writing, but the absolute high mark for me was guardians of the galaxy. The writing, acting, direction and humour was freaking perfection.
As for having grey area choices, that's mainly just a design thing, not a writing quality issue. Not every game is trying to present players with moral quandaries with no right/wrong answers or whatever. If you prefer that, cool, but that's not some issue with today's games, as if they all should have that or something. I personally dont get much from that kind of thing, as there usually is a more obvious 'dont be an A hole' option somewhere in there that I'm basically always going to pick.
Also, I too replayed Mass Effect recently and definitely think you're overlooking how very stilted and awkward so much of the dialogue is in that game. I was actually paying attention to that, because of all the flak over Andromeda's dialogue writing and wanted to see how much better the original was since it'd been so long since I played it. I do think the game still has enough personality that you get invested in the characters and all, and it helps tremendously that you are with these characters for so long(no surprise the least loved characters are largely the ones introduced late on in the series) so I'd call it a success in that department, but the writing itself was still very lackluster judged by anything except video game standards.
Now if you just wanted to criticize Forbidden West for issues with its characters and all, I can get that. The first game was largely the same, and it was a common criticism that the main characters just didn't seem to have a lot of personality. But I definitely do not think this is some 'industry wide' problem at all as you're making it seem.