Before the notifications started to be like
https://youtu.be/1u3M3qZ8N8s?t=15s
I already had trouble understanding which ones were unread and which ones I had read, now it is even worse!

The unread ones are those highlighted with a dark background, right? Nope! Differently from what someone used to the Watchlist would think, the light items are the unread ones, and the dark items are the read ones. This is confusing! It is even more confusing due to the fact that if my mouse is over the list of notifications (which is very likely right after opening the menu), the dark color changes back to a light color! Not to mention that having the colors to change from the "read" color to the "unread" color (as in the video), just a second after I'm start to understand what I'm seeing, makes things even more confusing...