Why am i not surprised at the other low ratings?

They failed to deliver my item twice now. The second time offered me a delivery window and i fully intended to be waiting outside for the full time to facilitate an easy delivery. However, half hour before the delivery window starts the tracking tells me delivery failed try again tomorrow. Not overly bad i suppose but whats really brought them this bad review is having to deal with their app which seems designed to discouarge people and it being impossible to speak to a human being.

I will attempt to be waiting again tomorrow during the newly promises delivery window but after that ill have to shop elsewhere and they can keep the parcel.