Is it really meaningful to speak of an anti-Bibi “bloc” that includes Lieberman and Gideon Sa’ar on the one end and Hadash and Balad on the other? Sure, they’re all anti-Bibi but they don’t represent any coherent alternative government.
I mean, all of those have in fact been working together in the past year to keep the previous government alive, so they're clearly capable to do so. It's JH that pulled the plug.
My understanding was that some of the Arab MKs also yanked their support from the government due to a proposal to expand the jurisdiction of Israeli law to the West Bank? I think the point is that, sure, a rackety government
can be assembled from the parties opposed to Netanyahu, but that such a government is never going to survive long term due to the unbridgeable differences between its right and left wings.