Combat Mission taught me about myself--- I am NOT a good tactical leader at any level.
Don't judge your abilities based on Combat Mission.
The game engine can only handle small maps, which prevent players to actually maneuver their forces.
Most scenarios, I have found, are just a gut punch, up-the-middle- you have no option BUT to take casualties and be put in a bad position. I think it's actually part of the design mechanic to make up for a game engine that is limited in it's ability to handle large maps.
This is the reason that Shock Force & Black Sea will never see my hard drive. Trying to fight modern, near peer battles on 2km maps is knife fighting.
Way back in the day I think Combat Mission had smaller maps. They were made larger at some point. They are up to 16 square kilometers now. The unit to map ratio has to be considered when designing scenarios. IMO a Company is about the best size for a CM scenario. The Below is a screenshot of a 13.5 square kilometer CMRT map. The entire map would not fit in the screenshot.

Below is a platoon of vehicles on the move.

Then the same platoon with a zoomed out map view. Plenty of room for maneuver unless maybe you have a Bn. plus on both sides. And again this is only a 13.5 square kilometer map, not a 16 square kilometer map.

Below is a 7.5 square kilometer Combat Mission Black Sea map. Not all of the map is in the screenshot but again well under 16 square kilometers.

Having said all the above, I do wish the maps could be made even bigger. Not sure my computer could handle bigger maps plus all the units etc. but I would try.