Can any industry insiders tell us why movies suck now?

You have absolutely no knowledge of this movie. STFU!

ofc there is a "insert current agenda" woven into it

Then you weren't hanging around older people. I heard over and over about how they were pushing liberal politics, nudity to normalize immorality, too many blacks in movies, etc. etc. I remember my parents turning off Dead Poets Society because it was pushing a leftwing agenda, with that awful commie Robin Williams teaching children to question authority. "In our day, children listened to teachers, and liberal, free-spirit teachers like that were fired, and we didn't have teen pregnancy and crime!" And do you remember all the criticism of how poorly written the original Ghostbusters was?

Remember the backlash against Good Morning Vietnam, or The Day After? Or any film that showed Vietnam as anything but a justified war that we would have won in a weekend had we just gone all in rather than pussyfooting about and half-assing it?

I haven't seen the first two, but I saw the 2016 Ghostbusters film and Captain Marvel. Neither struck me as even slightly political. What did you find in Captain Marvel that was in any way, shape or form political? How were either agitprop? Same for the Ghostbusters film. It was a comedy with no political overtones that I noticed. What did you perceive as political?

I don't see any attempts at brainwashing going on, and i you disliked Captain Marvel or Ghostbusters, that's your call. Why would that offend me? I liked both films I saw, especially Captain Marvel. I have no political motivation for liking it, nor did I ever get even a tiny sense that there was any Message with a capital M being presented to me when I watched. I saw a great superhero film that was no different from any other Marvel film other than it had a female superhero. If casting a woman in the lead role is a political statement to you, then perhaps we just have a different idea of what the term means.

As for the senile generation, I'm making what I believe to be a valid point. Old people have always condemned the art of the modern era as too permissive/liberal/immoral/you-name-it. Not every old person does this, of course, but as a whole, the older generation has forever been of the opinion that things were better back in their day, and kids these days are going to hell in a handbasket.

Those were the days!
Now they are instantly old news, since they were out already online.

I'm not sure cinema's age is a factor here, rather it's the way it is enjoyed that is outdated and irrelevant.
Music is way older, but it was doing fine.
Till napster.
I think online distribution killed digitalized media relevance, hence quality.

Not really. Back in "those days" I watched a movie almost every night on tv, and they were all new for me since I was younger and had waaaaaay more to see then than now.
So that's about 5-7 movies a week.
Now I watch 5-10 movies a week like you, couldn't give a shit less about each one.
Now they are way more available, way cheaper to obtain and watch, and they are definitely less memorable, innovative, inspiring, etc. NOTHING IS AMAZING.

Back then a good 30 % of them were GREAT film. Now if I see 3 good movies a year I'd call it a good year.
In reality, back then the creativity bar was so high that that stuff like Predator or Die Hard, which are awesome, were almost regular fare. I mean, they were good, everybody knew they were good, but nobody considered them timeless masterpieces (like they are now) in a sea of crap because, you know what, lots of other lesser movies were also good.
Now everything is blah. Vanilla with some more vanilla on top.

I had some minor anticipation for Ghostbusters afterlife. I heard it was okish. Well, nothing to watch there, other than the final 10 minutes of nostalgia value. And this movie was something I had some interest in.