Did you expect the surgeon to tell you he did not align it correctly? Measuring twice, cutting once applies to surgeons as well as carpenters. My hip surgeon took detailed measurements and then monitored my gait thereafter. That was also the very first thing my physical therapist did as well.
https://pmc.ncbi.nlm.nih.gov/articles/PMC4040374/
It is not an exact science so outcomes can vary. My surgeon threw out the hospital's 10 page dos and don't after hip surgery and told me that the only important advice was to "be a couch potato for the first five weeks because the only thing I can't do is make bones grow". He was a great surgeon and that was great advice albeit psychologically hard to follow. Proper measurements will account for that bone growth.

I would have felt better if your surgeon said this can happen after hip surgery and these are the steps we take if that happens. The blanket "I did everything perfectly" just doesn't sound right.