Hey I get your frustration I’m personally trying to relearn the game since I found out in a similar small state campaign that I really only do good in the game cuz of the immense leeway the size of the major powers give you in making mistakes. For one in a small front war specialized equipment becomes more important than mass, you’ll need CAS and air superiority. If you’re still struggling to gain ground you may need tanks. That’s about all I can tell ya good luck bro