1. Feelings can be useful tools. "Confidence" is not "worth" or "value". Self-Esteem can be confused with confidence. It's important to be precise. Being snubbed by a co-worker, your question is really related to social skills. People act like jerks for many different reasons, but a confidence founded in reality--and not others opinions--is a strong and real confidence. You are there to solve problems, create solutions, do that, your reality confidence will grow.
2. You ask if it's normal I suspect to see if you would encounter this "style" elsewhere. It's probably more common than not depending on the organizational culture and budget. Older, bigger, companies that bring you in as a "junior" level usually have mentor programs and some even formal.
3. I don't know the answer to that. The word "all" usually is a signal that the answer is no. But to achieve a very high level of expertise probably requires foregoing lots of other learning (i.e. social skills) that other people encounter as they mature. But rotten attitudes can be found everywhere.
2. You ask if it's normal I suspect to see if you would encounter this "style" elsewhere. It's probably more common than not depending on the organizational culture and budget. Older, bigger, companies that bring you in as a "junior" level usually have mentor programs and some even formal.
3. I don't know the answer to that. The word "all" usually is a signal that the answer is no. But to achieve a very high level of expertise probably requires foregoing lots of other learning (i.e. social skills) that other people encounter as they mature. But rotten attitudes can be found everywhere.