I honestly don't hate the self checkout, I hate it when they do it poorly.

Oversensitive scales, improperly weighted products, stuff without barcodes, tiny little bagging areas that can only hold two bags. No belt for unloading groceries. Please remove the item from the bagging area, help is on the way. (Help is never on the way)

The grocery store where I used to live had a bunch of regular lanes, You threw your crap on the belt, Scan it over the sensors and send it down to the collection area where you could bag it. It was honestly pleasant.

I went to Target in the evening once, had an entire cart full of groceries. I push it up front there's no cashier's open only the self checkout. I look at the person manning the self-check out and say

Why aren't there are there any registers open?

Sorry just the self checkout.

This is going to be like 8 bags.

Yeah, sorry.

I shrug leave the cart there and start walking out the door.

No, wait: The cashier goes and opens the closest register to the self checkouts