I personally do a very lousy job on binding. All my bindings seem to get some wrinkles in them no matter what.
I wouldn't let some old biddies worry me about the size of my crocheted baby hats. Baby's heads come in all sizes even for the very little babies.
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Bindings? I just went and looked at the bindings on a quilt on my bed I've had for, well, since I married my late DH in 1967. Sure enough, the binding on that one is definitely crooked and bunched up just a little bit in one place near the corner. IN ALL THAT TIME I'VE NEVER NOTICED IT. I use the quilt on my bed and love it because my dear late MIL gave it to us for our new bed.
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Someone doesn't want the sizes of baby caps you're making?
Is that someone connected with or works in the newborn nursery, Peds, or is one of the hospital volunteers? I'd bet that she is not.
I spent over 28 years as a hospital volunteer and I assure you, all the stuff we got that wasn't what they wanted or needed at that very moment, we wrote down so that every volunteer who came in later on "Their" day would look to see if a patient had come in who could use it. It was always much loved and we ourselves were included in the thanks for that small gift.
Please don't stop doing this marvelous job of making needed things for the sick, all of them are helped by such things or they would not be allowed.