The cart pusher limit has really nothing to do with overloading the pusher. It was because guests complained about having to wait for a line to enter the store. That's somewhat reasonable and safety reason. My typical lot maneuvering was I would collect going down one lane and come back another picking up 30-40+ carts total, and run it in.
Then they changed it 25 carts or really one well at a time.
The service co. that came to overhaul one of my stores pushers told me that they can actually do 50+ no trouble. They have more power than some of the older drivable pushers. When making the final run to the sidewell, I would get over 50 for one long run.
To the OP:
I would take a breath and calm down for a sec. Calling Hotline on your Mgmt will require documentation of ETLs breaking policy and witnesses to get any headway. Reporting will only get you blackballed from hours. And they will have the target on you to performance out. It would be better solved with aligning the TL with your actual daily tasks & effort and compare that with her expectations.
Yes...Unfortunately some stores treat their CAs as GO-FORs and the lowest cast TM of the store.
I worked everything from Cashier/SD/CA/FA then crosstrained to Hardlines during my Tgt days with some varying experience. Some of my Mgmt Team treated CAs with respect.
However, some didn't. One of my stores(a Super) made CAs, on top of carts,....
were expected to answer every spill call, had to keep an eye on every Backroom door for carts used by Backroom, and push food orders up front to FA/SB & dump grease, maintain the Can/Bottle recycler, breakroom trash...the duties never stopped. With that store, I just kept quite and did my job. And made efforts to get out of CA shifts.