I simplified the header and thumbnail to get rid of the clutter that was present, I understand that you want to show of whose community is this but that information is present on the right panel so I just got rid of that and added a nice gradient, and changed the font from Avengers font to Kanit font.

Again it's only my simple opinion, I'm not saying theirs is worse.

If you want me to visit other communities just comment them down below or if you have ideas about what should i change in my design.