[athrowaway29]

Thanks for your advice. I cannot see a complete career change working. Despite my misgivings, I'm paid well and have a heavy mortgage I could not manage if I were to become junior in a different field.

"Escaping the environment" in the form of moving to another city or country is certainly an option I need to consider.

[Bakary]

It may seem a little silly but simply making changes to your routine can help. It's not necessarily the case here, but it's worth investigating whether frustration at work is indeed the root cause or a symptom of some other problem that has built up over time. I hope I don't come across as an armchair psychologist. It's just that my experience has shown me that my mindset can dramatically change based on factors that seem less important than they actually are (for instance, a little more exercise or a little more sleep) or factors that seem only distantly connected (in my case, jadedness was cured by taking up cooking classes).