Also, remember that clinical placements rely on subjective reports/feedback from other humans. Sometimes, while we may not be doing a "bad" job, we aren't what somebody expected.
When I was a student, I preferred to, in many cases, figure out the answers to my own questions myself, either by reading the chart or looking things up in books. I would usually confirm my findings with my preceptor, or if I could not figure it out I would ask. Apparently, because I did a lot of the work myself, my preceptors felt I wasn't asking enough questions. They thought I should be asking way more than I was, so that got brought up to my instructor and I was spoken to about it.
Sometimes, you just have to listen, accept what is being said with grace, thank them, do as you are asked, and move on. School will end, and as long as you aren't causing harm, you won't have to jump through those hoops forever.
Because we are all different, we aren't going to fit perfectly into what each person feels defines a good student.