[Grustaf]

> Now I can barely play for more than an hour without feeling some kind of anxiety that I'm wasting my time or need to get to the goal as efficiently as possible. How can I fix this!?

Listen to that feeling, because it's the truth. Video games should be at the absolute bottom of your priorities. Every minute you're playing video games is a minute you could be improving yourself, meeting new people, travelling or whatever.

35 is not old but time is nonetheless limited, you need to make the most of it. Once you have a family and feel some kind of fulfilment, then you can play video games if you want. I bet that right now it's just a temporary escape from your feeling of emptiness, but as soon as you stop playing the feelings come back, stronger than before, because you just wasted another hour without getting any closer to your goal. It's very analogous to trying to numb your ennui with alcohol, it's not a good idea.