Just because you aren't running into problems doesn’t mean the platform is perfect; it might simply mean your standards are lower.
Use some logic before attacking: Luxembourg is only the size of Saarland (German state). Fewer orders and fewer deliveries naturally mean fewer problems.
A bit further south, here...never had a problem apart from reconciling the moral side of things. But, on Tuesday i had to order off am as no local store would price match. Item arrived friday. I was in one of the stores just a few mins ago...they now have the amazon price showing.
I let stores know they mess up, so an email will be sent to $tore.
As for rude delivery - have stuff dellivered to a drop-off point. Mine is my local newsagent. Very slim chance of them ever being rude.