Me personally I enjoy the standalone feel of Phase 4, one thing I didn't like about the first 3 phases was the solo stories and characters individuality being marginalized due to the big "team up" "connected world" aspect.
They felt felt more like commercials than feature films.
Yeah and the fact they they ended a 10+ year story. All of the Phase 4 movies feel standalone with no bigger connection yet. It is hard to get into them with no clear picture or anticipation. Phase 1 being slow was fine because we knew from the start they would form the Avengers. We anticipated their 1st scenes together. Phase 4 has not given any of that yet it feels like Ant-Man will be the movie that gives us a glimpse.
Dr.Strange was expected to do that but fell very short into doing that it was an ok movie but didn't have a lot of multiverse or lead to anything bigger.
Thor was never going to be that.
Black Panther would have been if Boseman didn't pass away.
The shows are more miss than hit after the first batch that was very connected. Moon Knight, Hawkeye, and Ms. Marvel have been more Netflix /Agent of Shield like you can watch and they are ok but they are just there. She Hulk will have Hulk at least but not expecting more than fun from that.
I think one of the issues is that the MCU prided itself on being connected and building up to something definitive since the first Iron Man. But since, as of now, we don't know for sure what we're leading to; it feels a bit odd and off. Kang is supposedly gonna be the big bad and sure another Avengers movie is coming down the pike. But we really don't know much besides that which is in contrast to before. I think the MCU has been so same-y in how they do things for a while that when they branch out in terms of scale, storytelling, humor, etc. that it throws audiences off.
In addition to that, while we aren't definitively sure what they're building to, the MCU is still throwing a lot of team ups and mini crossovers. Scarlet Witch and America Chavez with Dr. Strange, Guardians of the Galaxy with Thor (even if for a little bit), Kate Bishop and Echo in Hawkeye, Yelena and Black Widow and Hawkeye, Ms. Marvel and Monica Rambeau with Cap Marvel, She-Hulk with Hulk, Iron Heart and Namor with Black Panther. And not all of these feel random and most of them make sense as to why have those characters interact, but it's still a lot. So many crossovers that it doesn't feel like things are as stand alone as being said imo.
And finally, it probably feels worse to some than it is just because of the sheer number of properties we're getting. The Infinity Saga was, not counting the shows because they were really separate, was 23 movies over 11 years. Phase 4 is already:
-11 films over the course of 4 years
-14 planned TV shows. Some of which, like Loki, and having multiple seasons.
And they're introducing SOOOOOOO many lead characters now compared to the other previous MCU phases. It's a lot
Obviously the MCU is and will continue to be successful and the worst received MCU movie is still seen as better than most other blockbuster fare. But this is the first time many saw definitive dents in the MCU armor which is interesting