
They need to stop thinking that problem solving is one way and a new person isn’t always there as a threat.
Undervalued doesn’t just mean that you’ve paid below national or state average. Undervalued can also means that they know you are a talented person and a good fit for the role, yet they still try to micromanage you which results in lacks of growth and inability to be creative.
Leadership stays at a high level which is someway proper. However, when you brought a new role in the company and the person who fills in the role resigned consecutively - you might want to take a closer look at what is going on. It might not be an issue with the person resigning but their manager.