My trueskill has been on a downward slide to Hel ever since trying new people other than Superman/AM/WW... not only does losing as dif people drag it down, but then when i start using WW again I suck with her. Still, its almost impossible to lose with Superman if you know how to use him, and to a lesser extent AM no matter how rusty.
Went from 36 down to 32 in i think the last 4 days by changing shit up. Seem to lose trueskill fast in this game, but not gain it once u get to a high enough level as there arent a lot of people around that are above that you can play and maybe beat to regain some trueskill ranks ey.