OK, so very easily, the most annoying thing is the protag talks WAY too much.
It looked like a tutorial level. My guess is that is why she was talking too much. She was giving some context as to what she was doing, like shooting the canister after it was full. Also, how to take down the big guy. For example, she needed to convey that she needs to get under it to shoot the lid. My guess is that she stops doing that after couple of tries.