Painfully average employee

I'm really struggling with my self esteem and current work situation not sure if anyone can help. I've worked for years in a specific technical role within a niche industry. I'm 34 and I no longer love my job. I still like it and I make really good money. But current financial situation has forced me to get a side gig and I'm burning out. My current company is very demanding and stressful. <br><br>I've started to realize that I'm just an average employee. I'm reliable, get stuff done but I'm not legendary at anything. Not a problem solver, not a leader. I just do my job. I've realized this is okay but it's hard for me to feel happy not being awesome at something. <br><br>I'm considering transitioning, I want a happy peaceful career but at my age I feel like I have to risk making a mistake and choose a job I hate not being awesome at. <br><br>Has anyone switched careers and thrived mid 30s? Does anyone know of jobs that are happy and peaceful? I want to make a lot of money still but I don't want to not love my job.