If it helps at all, I've noticed some of my gaming skills slipping too, and it's still my go to hobby whenever I have the time. Part of it is just age, and also not being able to sink entire days into it anymore like in childhood.

I had to return a game recently that really appealed to me and was reccomended by a youtuber that tends to have good reccomendations because the moment to moment gameplay was just too twitchy, required juggling too much info at once, and needed performing too many complex key combos at speed.