I found a very fast way to load steam if you use the nouveau drivers on your linux machine.
In the past I found a shortcut for it that bypasses the check of the video drivers and loads it, but this is way more effective.
find ~/.steam/root/ \( -name "libgcc_s.so*" -o -name "libstdc++.so*" -o -name "libxcb.so*" \) -print -delete
Ok that's what you need to copy paste on your terminal to fix the problem, so, everytime it refuses to load, you just launch that command and boom then it loads perfectly :)
Another problem solved by Wisehammer!