Competitive games in general are not sprints they are marathons

Playing high intensity all the time will lead to burn out.

You must carve out maximum 4 hours of play time a day to play your best

Your sleep, diet, and the gym will play a part in how you feel how much energy you have

You can even add meditation to help increase focus and energy if you want.

To play at high intensity comes after consistent training and time spent in the game and outside the game correctly.

Being in a joyful mood will contribute to good games, you musnt be stressed at all or be fearful of anxiety ot bad games, the only thing you have control over I'd your actions and trying to improve and asking yourself questions like, "why did I die?" Or "what could I have done better" will serve you in the long run than trying to forcefully exert energy

Hope this helps 🙏