Something is wrong here, almost like a mid life crisis in reverse

So age 41 and punting for 15 years and then decides that life isn't quite right so questions whether to stop punting, surely at 41 having never punted you should be just starting to try and fill a void and in a desire to have more meaningless sex

All joking aside I do remember back 15-20 years ago nearer the start of my punting career when i'd only punt once every 6-12 weeks I did sit in a parlour bedroom quite a few times waiting for the girl to come in and think "WTF am I doing here again"
Looking back deep down I was probably after a decent long term relationship and I was under a lot of stress at work, I could watch porn and have a wank at home for free but occasionally needed the physical release with an actual person to try and obtain more fulfilment.
More often than not i'd leave with buyers remorse wishing that I hadn't spent my time and money on something that wasn't that good and instead of finding fulfilment it left me more frustrated.
Perhaps have a good think about where you are in life and where you'd like to be then try to plan how to switch from A to B, as others have said stop doing things that you do out of routine but don't actually enjoy
The good weather is here now and longer nights, I would recommend getting outdoors for some exercise and fresh air, a walk in the countryside or a bike ride can do wonders for your mental wellbeing

Essentially find a hobby or something that you can spend some time focussing on that you do enjoy
The thing with punting is that the high you get from a decent punt doesn't last forever and you need to learn that often you will get a bad punt or it will only be mediocre anyway, by and large I do enjoy my punting these days and i'm back up to 4-6 punts a month but prepared to accept that occasionally I cop for a shit one