I don't think anyone is berating, but trying to encourage him that this is a necessary part of the skillset for a woodworker as well as save some money.A quick google search to actually respond to your question and not berate you on your skill or frustration you are having with re-establishing the original reference on your chisels:
I strongly suspect the reason the chisels got out of square is from due to his honing technique & Mike is exactly right in what he said.
As already stated, flattening the back of a chisel is the simplest of jobs, only requiring a flat stone and a some elbow grease.
I hope an offer of help near him arises that will be a learning experience!!