I would echo what GG said. I am pushing 50 years old and have increasingly been able to cope less well with stress over the past ten years or so. Simple advice (and you are doing this by listening to metal), separate the elements of your life, compartmentalise the different parts into their own space. I start my day by listening to an album and then finish it by doing the same. In between is when all the chaos of work happens and short of a lottery win that won't go away any time soon but I still step away when needed - even if it is to walk around my garden for 5 minutes before going back to it (I work from home largely). The point is that 9-5 is not my time it is someone else's - shareholders, directors, customers. Before 9 and after 5 is my time and I make a ceremony out of the start and end of that time because it is for me and it deserves that attention.
Also, for me, being outside walking in the most rural and natural environment I can find before work and at weekends is a massive help. Physically it helps me stay healthy but mentally I simply could not cope without that cleansing session each morning. Time for me, thinking about nothing and nobody else is the key for me and make sure you are not robbing yourself of your own mental space by letting others intrude into your thoughts.