I’m not sure why you feel so aggrieved? You asked what the purpose of a broker like Parcel2Go was and got a response. They are convenient and can offer a cheaper service. The pitfalls are you have another link in the chain when things go wrong and they have a somewhat nefarious system of insurance against damages and loss. If you operate a small business sending hundreds or even thousands of parcels each year the cheaper cost and convenience of multiple couriers at the click of the button will probably offset the setbacks and costs associated with missing and damaged parcels and insurance is probably not worth taking.
For your average punter don’t use them if the loss or damage is more than you are prepared to put up with.
I don’t think Kev was insulting you. I have no idea what consumer rights are in Belgium and he was only trying to explain the set up here in the UK he understood them.