Basically neither the liberal coalition or the Labour/Greens bloc have the number to push anything through the senate, or push it back out. The latest numbers indicate the each of the major voting blocs will need 7 of 10  non aligned senators ( the wedge)  to support any senate action. Remember at the last election there was weeks of negotiation with just 3 independent members of the lower house, this is much worse…

If the Senate rejects 2 bills for the lower house its double dissolution, beaning both the senate and lower house must be reelected.

Yes it truly is the senate of doom.