There are other options, co-GMing (letting someone else handle part of the workload or all of a certain part), letting someone else GM and so on.
Honestly you were having a great atmosphere, the variety in the players and their interactions were great and the setting itself worked. It showed what motivated us from being just ordinary criminals into our anger and hatred being stoked and wanting the Imperium to burn. You gave us a reason to slowly embrace chaos instead of just "lolevil". Our characters were not evil, but they were not nice either. Basically you captured the spark in the bottle and had a power level set low and we were outmatched so brute force couldn't solve all the problems (the ones it did often created new problems)