What map is that by chance? You have a really zoomed in shot so I can't tell.
Certain maps in particular, like SG Ancient Japan, (especially ancient japan.) are kind of laggy. Before I got my new computer (my old computer was about average in terms of FPS/lag.) I myself couldn't play on the map either. It's one of the two maps I know of that gets this response.
The other map, Yellowstone, I have seen similar responses - not for lag, but because it's a very frustrating map for a lot of people, understandably.
Chad has announced in a news announcement thread recently (two actually.) that better tracking of maps and how often they are played/like is being introduced soon, so maps that get a response like this will likely go. Asking for all community made maps to be removed is quite a stretch, though, as there are plenty community loved ones that only fall behind because SG4 and Breeze make for short games, easily accessible, etc...