I have to deal with similar issues in my neighbourhood; any service vehicle will have to block the bike lane because that houses driveway is already full of vehicle.

Delivery trucks, full stop, around here. Though some stop on the street instead, which I prefer, but car drivers usually don't.

In the end, I find it hard to be angry at overworked, underpaid people, who have to work around infrastructure that clearly hasn't been planned with their job in mind.

At least UPS is switching to large bike-like vehicles around here. Hope that trend continues.

We have a suckhead that parks his delivery van on the middle of a cross over (we call it a zebra pad) everytime to deliver goods to our local flower shop. So I tell him he is unlawfully parked, he says I shouldn't worry, it is just for a minute. I tell him it takes only a second for a pedestrian to get hurt. He didn’t care the slightest bit.

Don't they have traffic wardens in Cambridge? They'd be fined and possibly towed as well here

Amazon drivers aren’t Amazon employees, and aren’t paid well enough or treated well enough to care. Don’t be angry at the drivers, be angry at Amazon.

That can be both incompetent and arseholes. The 2 aren't mutually exclusive.