Good luck to you. Going through a job hunt is tricky. It sounds like you have an interested company and I hope it works out. Keep pushing.

> They all want innovative problem solvers with deep knowledge but don't ask the interview questions that would show that up.

The hiring process is a quintessentially human process so you're going to experience many different types of people.

Keep focused on enthusiastic service. Focus on showing how you can help the company out with their mission. Research the company ahead of time and build a case that you are ready to communicate to the hiring team. Answer their questions honestly and directly but if they don't ask great questions, no big deal, just proactively fill that gap with good reasons why they should bring you on.