I’m having that same imposter syndrome feeling right now. But one of the SMEs at work today randomly complained to me about another agent and his lack of caring/learning and thanked me for how I am. So. Sometimes it works out well as long as you’ll listen and learn. You can always learn more it just takes time.

In most crafts, and I consider software development one, there's rarely no way to improve. The problem arises if the client or the employer wants you to improve too quick, faster than you could, and sometimes faster than even possible.

But to be fair, sometimes developer doesn't want to improve either