I am bad at this game.

[Herr Straße Laufer]

As a player who has won less than some, lost & drawn more than most other players, I can say that the game has many facets. :rolleyes:
Winning every game is not possible. Losing every game can happen up to a point. That is the simple mathematics of the game. :chin:

Using e-mail exchanges to gain more knowledge as you play, or finding a willing tutor, often is best. :cool:

You may never fully understand how to play well everytime out of the box but, you can always strive to play better. As many have written, or implied, a simple tactical base can go a long way.
That will require understanding how to fight, especially on this scale. Which requires knowledge of the units and how they interact.
Knowing what you can do with what you have to defeat the strengths of the enemy will help. Time, research, and play often help to develop skills. :bang:
You have to take some lumps, realize that they won't be over soon, and keep moving forward.