Maybe it's how l grew up or who l was exposed to. Maybe I'm not even an INFJ. I have trouble relating to this in its entirety.

I genuinely appreciate criticism when needed, especially from those l trust. Whether l will implement it or not is a different story since they might not be able to follow my purpose. I do not want to walk around with toilet paper stuck behind my pants. Actually, l would feel betrayed if someone l trust does not tell me out of fear of embarrassing me or hurting my feelings.

Even criticism from antagonists aren't bad either. You can easily understand their psyche or sometimes it does help with self improvement. I think every type will get initially set back by any form of criticism, not just infjs. Nobody will be smiling. But I do agree with you that INFJ's self-improvement obsession will take it with stride eventually.

Infjs ability to deeply connect with anyone if they want require a certain level of acceptance, even some really horrid people. In terms of tipping, this sounds trivial to me. While l understand the waitress, (yes l was a waitress during school working exhausting hours, so l understand), l also understand the other friend who came there to spend their hard earned money to enjoy a good experience and service. It's not a charity. Most likely in that situation, l would sigh at my friend and maybe explain the waitresses' situation eventually. Then l would secretely leave the tip myself as we leave. Humans are flawed. If you nit pick about every little thing, you will never bring out the best in decent, but flawed individuals. I only have issue with people who have more severe issues, like delibrately bullying, manipulate or playing tricks on people for entertainment or attention, or doing something that seriously harms another.