Na I think you can - break up that is. Aisa koi life/season long contract toh nahi hota na. If Asim finds that he can no longer tolerate how Shukla treats him - feels Shukla has double standards in the game - toh he very much can break up with him.
Re Shukla's behaviour with the girls and in general - that I agree. Ke Asim knew that from before, but it didn't bother him because he himself was content with Shukla till now. That's matlabi on his part. But the timing of what he said doesn't negate the fact itself - Shukla's behaviour is absolutely atrocious, and the fact that he gets away with scot free is even more so.
In short ye kafi kuch DDT type hai jab tak same favorite hum dost jab different favs hum jaani dushman...
Season 11 ke itihaas ke panno se prerit !