Can't sustain T11 maps anymore...?

Hey, I'm getting increasingly frustrated at the moment because I just burned through my last Shape Racecourse again.

My atlas is at 84/126 (no t12 / only racecourse T11) and overall I bought 30 Shaped Racecourses already, hoping to be able to self sustain them at one point... but i seem to just not be able to do so which really frustates me.

what am i doing wrong? I go 2x chis / alch / any pack size roll > go (without zana mods)

i got lvl 7 zana and a biscos amu.

am i just spoiled from breach/legacy leagues or do i have a badluck streak?

im legitimate stuck and cant get an actual grinding session in because I keep running out of maps which really takes the fun out of the game for me atm...