Giving less skilled players tips on how to improve is acceptable when playing team sports.

TRUE.

Although the nature of the sport is one of competition, helping a person to develop their skills by giving tips is a grandiose and beautiful gesture. Especially if that person is your opponent in the game.

We are human and we like to have fun, to win, but we also like to build relationships of friendship and to help others. So there's no problem helping a less skilled player in a game.