So, someone who loves to compete and progress and frequently returns to their hobby to do more of that... is experiencing a disorder.
Interesting.
...no
Read what I posted, it's a direct quote from the WHO ICD.
The biggest key defining characteristic of something being a "disorder" is (and this is a snippet from that): "the behaviour pattern is of sufficient severity to result in significant impairment in personal, family, social, educational, occupational or other important areas of functioning."
If you enjoy playing games, that's not a problem
If you enjoy playing games to the extent that it's interfering with your life (like you lose your job because you're always skipping to play games) then that's a problem