Maybe I have just gotten unlucky, and fallen in the tail end of their defects.
> the bottom of the drawers is made from something
In British, we call this "hardboard". I've always assumed it's "hard" in comparison to cardboard: https://en.wikipedia.org/wiki/Hardboard
There are (from searching) several supplies of cheap, flatpack furniture for landlords, which probably explains why half the properties I rented as a student had the same furniture, made of 5mm thick hardboard and bits of plastic. That stuff didn't even hold together properly when it was new, let alone a couple of years old.
Habitat should be decent quality. MFI used to be a major retailer of flat-pack stuff, but they went bankrupt in 2015. My parents bought almost everything for the kids' rooms from MFI. None of it is broken, 15-25 years later.