@shellstarbarley
It just seems to be that kids aren't as resilient anymore because their parents are still doing everything for them at 15/16. I was always under the impression that when they are teenagers your job as a parent is to get them ready for the next step into the adult world and the adult can be pretty rubbish so giving them and teaching them the tools to deal with this is IMO important. ie getting a small part time job - paper rounds and babysitting for friends and relatives is legal - it gives them a sense of responsibility and independence so when they come to getting a job at 18 they know what to expect. I am not saying every young adult is the same but I know of several young adults who can't hold down jobs because they have never had any responsibility and find criticism hard because it is something they have never had to encounter.
It's not just parents doing everything for teens though. Teachers do it too. I remember sitting down with my DD at 14/15 as she wanted help with an essay. She asked me as writing has been part of my professional career. As soon I started trying to have a discussion with her, she said "I'm going to ask my teacher, she'll just tell me the answer." and I did check with her afterwards and the teacher did indeed just tell her the answer. DD didn't have to apply any effort to working the answer out for herself at all. She simply had to regurgitate what she had been told in the way she had been told to regurgitate it. She was never allowed to be wrong and correct herself in her working life = her education - as you say they "find criticism hard because it is something they have never had to encounter". Though clearly they frequently do now because people keep calling them snowflakes. Honestly, it's a bit much for a teacher to call these children snowflakes.
Academically, teaching regurgitation clearly worked - she gained a 1st Class degree but, gosh, DD's knowledge is neither deep nor broad. She was taught to the test and entirely reliant on the teaching staff. Arguably that might be caused by an over-abundance of educational policy and directives. If there's a lot to get through, teaching to the test becomes the easiest way to manage it.
Unsurprisingly, when she started work she really struggled to adjust because she couldn't keep getting for an extension for a piece of work or ask for a lesser workload because she was stressed, and no-one was willing to spoon fed the answers - no-one has time. She was expected to know or find out for herself and do. It was a big shock for her.
Luckily, her first class degree is in a shortage area so she can work for who she wants when she wants. She's one of the lucky ones.
It's easy to blame parents but it isn't only parents who are spoon feeding children they then expect to show initiative and resilience. It is very unfair to the children and the young people they are becoming. They are doing their best with what they were given.