I think getting better at something is not always stressful but It is rewarding too. For example, when we started driving for the first time we were really bad at it. Driving was a horrible and frightening experience back then. But as we got better, driving turned out to be the best thing ever. Games get really boring and a drag if we don't play them somewhat as devs intended and get better. For example, Doom eternal and Doom are boring, repetitive and a drag if you play these on easy, don't switch weapons and don't use the right weapons for the right demon. The moment you start switching weapons especially in Doom 2016 you become invincible. It is extremely satisfying. Same happens when you start using the correct weapon for every demon in Doom eternal. That doesn't mean that killing same demons again and again on easy difficulty is not fun but It gets boring and unsatisfying very quickly. Exploration games are different though. After a while I started enjoying exploring the world of Assassin's creed origins more than the combat or missions.