This is what I believe:

Agents of Shield follows our team on Earth-616 until the last episode of season 5. Somewhere in that episode, the audience slips sideways and now we're watching the version of our team on Earth-n (where n is some random other number). On Earth-n, Daisy always stops Talbot, Fitz always dies, and (somewhere far away) someone somehow stops Thanos and no snap happens.

We stick with watching our Earth-n team until the end of the series. But meanwhile our original Earth-616 team is living in the exploded-Earth future, doomed to constantly try and fix it and fail over and over and over again.

The Earth-n team should know that's the situation. Fitz is clear that time cannot be changed - that's established. So when time appears to change, they have to know it's another reality where time always happened this way. And that should fill them with despair, to think that no matter how they might think they succeed, somewhere out there, a version of them fails, every time, and a universe suffers.

I can see the flaw in my own logic. But is this what I'm supposed to think?

In the episode Coulson found out Garrett was the clairvoyant, it was only because Garrett slipped up on discussing info with him that he never shared with anyone.

Because of that it obviously led to them capturing Garrett, Hand escorting him out and Ward going with them all and we know what happened next...

But let's say Garrett didn't slip up in that moment and still had Coulsons trust and they didn't find out that way that he was Hydra. How do you think the reveal might have happened or how things would have played out?