Yep, I noticed bent and useless axles about a year ago.
I was hope the Policar F1 Lotus I bought 2 months ago would have been OK but it too was infected with bent axles.
Every Slot-it solid and full axle I have bought since early 2017 is bent and would only be useful if my cars were 40mm wide.
I have since been using Slotting Plus axles.