How to stop bags of chips and vegetables from being crushed?

I usually only go grocery shopping every two weeks. Because there's usually some stress involved. When I get to the checkout line, I try to set all my heavy items (cans and frozen stuff) on the conveyor belt first, trying to "hint" that these should be placed at the bottom of my grocery bags.

Said "hint" is rarely taken: Usually, the bagger (IF there's a bagger) just throws stuff in the bags. Vegetables at the bottom, bags of chips at the bottom. They don't care.

Today at my local grocery store, I sat there waiting for the conveyor belt to move because the checkout girl was busy chatting with the bagger girl about what high school each had gone to. After the checkout girl figured out that I was there, she said, "Were you going to ask something?" Me: "No, I was just waiting for the belt to move so I could put the rest of my stuff on it."

The checkout girl and the bagger girl kept on bonding: They'd both gone to Catholic schools but they weren't religious, etc.  At one point, the bagger was tossing store-made cannisters of soup in my bags, and I had to break in to say: "Put those upright" and "Don't put all the heavy stuff in one bag---put the heavy stuff at the bottom, and then light stuff on top."

The girls looked at me like I was a "Karen."

Yeah, well, if I'm a "Karen": In the old days, a "Karen" was just the word for a person who wanted a basic service done right.

I went to the manager and complained---about the checkout girl and the bagger not paying any attention to me at all while they conversed, and about the bagger throwing chips and soups and vegetables at the bottom of the bags and then throwing heavy items on top of them.

For the rest of the day, I felt terrible for having complained about these girls. They deserved to be complained about, but I still felt mean and guilty.