Heck I remember even Ben Daniels got similar pushback. When Cirdan is SPECIFICALLY described as "old" by the Third Age. So casting a 62 year old for the Second Age made perfect sense. The internet gives way too much cultural weight to people who DON'T. READ.
Will never forget how horrible people were to Charles Edwards in season 1, for a combination of factors, but mostly due to his age. Then those same people changed their tune in season 2 when he got more screen time and they realised having an experienced actor can be a good thing actually.