Pibow Coupé 4 and faulty Lego holes

I’ve been trying for 20mins to fit a lego brick into the bottom plate of the Pibow Coupé 4 and I couldn’t for the life of me get it in. After a while I realized that it would work with tremendous force and some chafing of the studs.

It was then it occurred to me to see if these holes really were up to spec…
So what’s going on? Why is this? (Bought 2019-07-19)