I also stumble trough this Game,despite playing Wargames since the early 1980ies im having a though Time with this one. For now i keep muddling trough because i think there is a good Game in there.
There are board games around that are more difficult to play than TOAW. Yet, those games force the player to manage the whole turn, practicing the rules as one goes, i.e. they are more transparent. Computer games do the work for you, which is nice, but then people tend to just ignore the details and results begin to seem arbitrary.
Keep going, but pay attention to the fact that the game begins to be rewarding when you begin to understand what is going on. If you just look at raw counter numbers and movement allowances and push counters around, then it is better to play a simpler game (under the hood), in which, at least, results you will be predictable and your planned strategy will make sense.
I suggest you play simple scenarios like Kasserine and Arracourt SLOWLY, consulting the manual after each interaction an trying to understand which variables were in play. The effects of some variables will only show up in some scenarios. I, for instance, ignored the huge effect density can play in losses and movement until I tried the japanese Singapore invasion scenario, where high density is unavoidable. It isn't a pleasant surprise not to be able to move your units to reinforce an hex because of movement penalties.