I'm mostly gonna comment on the Netflix shows, but it's been said a bunch of times but people trying to shoehorn the Netflix MCU shows as canon as silly.
-At least with AoS and Agent Carter you have some blatant crossover between characters and tie in moments like them finding the helicarrier or Samuel L Jackson cameos. Netflix doesn't really have anything as deep or concrete as that. In fact it's missing things like the Avengers Tower (it was in a motion poster, but thats it)
-Completely different in tone, in aesthetic, and in just about every way than the MCU movies. The movies have been praised and criticized for being so hyper connected tonally, aesthetically, etc. The Netflix shows are such a departure from that. It's like The Mandolorian is darker than your standard Star Wars Episode, but it's still very much feels like Star Wars. I think if anyone says that the Netflix shows "feel" like the movies, they're lying to you or themselves. Even with the "DCEU" or whatever, they play around with their movies and alot of them post JL do vary, but even then they still feel like they could be in the same world in some aspects. There really is noting from Daredevil or whichever shows that feels like the MCU.
-Most importantly, what has been said by Kevin Feige. He has hinted that these new Disney+ shows will be the first time they
fully interlink. All the people saying "until Marvel tells me otherwise." That quote that caused a few people to get a conniption...is basically saying that they aren't "linked" or canon.
I just don't see how anyone can logically say that the Netflix shows are canon to the movies except for the weird one sided references. And even those one sided references started to fade a bit. If the "connection" is one sided and there's no flow or synergy that doesn't seem canon.
At the same time, I don't see why people still care. I think what I've read is people saying: "
But but but THEY PROMISED US" that everything will be connected. And before the first trailer for DD, I wanted that too, and I get it is slightly annoying that we didn't get them all connected (even though we still got a decent amount of good TV seasons) but as the shows evolved they clearly didn't fit with their cinematic counterparts.
Again they look different, the filmmaking is different, even the style of acting and dialogue is different. It would've been a detriment to both if you tried to put some of the Netflix characters alongside the rapid fire, quip a minute style of filmmaking of the movies or taking someone like Holland Spidey being thrown into the TV-14 not kid friendly gritty Netflix movies. It ended up being for the best.
As for AoS and AC? Agent Carter is for sure canon as they included the Jarvis actor in Endgame. And, more importantly, it has Kevin Feige's name on it. I can't comment much on AoS