Ruby I know how you feel
I think food shop workers across the land are about as fed up as you are, having been worked till they drop since March and having to deal with some pretty vile attitudes from a minority of customers. Goodness knows how the NHS staff are still on their feet. There have been some great things going on as well, as MoS says, but it has not been easy for anyone.
I have been getting bits of shopping for neighbours, but most are fine now. In the early days they suddenly noticed me going to work in my uniform and pounced with requests for hard to get items like eggs or hand wash or the holy grail of flour. I did feel a bit like a black market spiv for a while
We got quite a lot of customer saying thank you for going out to work and providing a service to them. That was nice
I think things will change a bit round here. Reading is a commuter town and a lot of people have been working from home very successfully. I think that may continue and a lot less travelling for meetings, now people have got used to video conferencing. Certainly the roads are busier, but nothing like as bad as pre-lockdown