With the ad adjustment came these banner ads on the top of comment sections and they are atrocious so much so I don't bother reading comments anymore. They all have the obnoxious white backgrounds and they flicker since they move. It feels light no matter my phones britness they are blinding and since content doesnt get loads of comments the banner is just distracting while reading. I'm on board with ads as I haven't paid to remove but this specific style changes how I'm using sync now.
On sync for reddit I was annoyed by the permanent ad bar at the bottom of the screen, because it is where the android buttons (home, back, app overview) are and sometimes I would accidentally click an ad.
I actually really like the new placement.
Edit: also they don't flicker for me at all (Fairphone 3). And the beta already has redgif support, so I don't understand half of OPs complaints anyway. Darktheme matching would be really nice, but I have never heard of that being a thing supported by ads.