Ok so recently I've been thinking about how the universe is expanding. We know this because distant galaxies are redshitfted. But I have a problem with this. Distant galaxies don't exist anymore. When we look very far away, we're looking very far back in time. We're not observing the universe expanding now, we're observing it expanding in the past. And it seems to be expanding more in the distant past than in the recent past. Which implies the expansion isn't accelerating, on the contrary it's slowing down (technically still acceleration but you get the gist).

Of course, shortly after the big bang, the universe experienced a rapid period of insane expansion. Is that not what we're observing when we see red shift of distant galaxies?