Shop "Reserving" Loading Bay

I work for the coop and most of the time have to do front door delivery.
80% of the time I will have problems with customers parking in my way.

Heck today I was doing a blind side reverse into a coop garage besides one of the few pumps and someone shoots in behind me while I’m reversing and tries to start fueling up.
This often happens.

Another one was a elderly guy who refused to move forward so I could get into the loading bay because he needed milk. He left upset because the store ran out of milk and the only milk was on my truck.

Honestly I think the elderly are the worst.
I’ve never had an issue with anyone under 30.