Well all those flights you mention are back to back trips, and WW are productive when doing these, apart from LAX and SFO which are again two nighters for WW and would be one night for M/F.
It could be for many reasons but it's always best not to guess and then post it as fact, don't you think!
The vast majority of crew are nice people and even the most staunch Bassa mentalists don't actually blame the Mixed Fleet crew for all this.
They do bizarrely blame people like you if you are a VCC and if you are a pilot they tar you all with the same brush unfortunately and they do blame people like me who worked; but most strikers and other crew don't actually blame M/F crew, they are just pawns in all of this and I see M/F and other crew chatting on the bus all the time nowadays.
Trouble is that some of you enjoy peddling all these nasty stories about a very few misguided crew and try to tar all crew in the same way, on here and other forums, that Bassa try and tar all pilots; and being supposedly intelligent people it's a great shame and you shouldn't lower yourselves to that level.