I can identify most of what you are saying from my position.

The lack of mentorship is a big issue I recognize it. I have even tried to have remote ones but it's hard to maintain thoses relations.

Being a "Jack of all trade" is not even bad for companies but in the process of recruitment. A jack of all trade is not really trusted by companies. Companies prefer recruit you as an expert but work with you as a Jack that's kind a paradoxal.

Thank you for your answer.