Depends on what we are playing.
I am horrible at video games.
In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.
It depends on the quality of the program. Some 'against the computer' games allow you to set the skill level. Some games are definitely 'winnable' if you know the trick. eg. NIM if you go first.
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei