Oof, that sucks.
I kept expecting one to jump from the walls above me as I went downstairs, get into the back of my shirt, and get squished as I try to get it out. It’s happened with house centipedes, and it’s not fun. Especially when their legs keep moving after their dead.
Holy moly, that sounds like a very unpleasant basement to have to deal with.
“Whelp, time to do laundry. The fun part is when the creepy mutant spider cricket launches itself at my face, yay!”
Clearly I was very lucky. I highly doubt the tenants ever used the place either. It just belonged to the crickets.