700 hours and still suck at the game

Like I was playing France right and I lasted about till 1941 December until Germany got bored of so it launched most aggressive attack it could. I got clapped in matter of days while I was busy fighting off Italy in Tunisia and like I tried second time and this I managed to hold Tunisia but still got clapped by Germany. Like are they buffed in this new DLC or what but when I force attack them they take absolutely no damage. At least in the second try Italy got clowned by UK by losing its capital city. Like my counterattack was comparable to Steiner’s counterattack. I am thinking to play as Soviets but if irl germany was 14km from Moscow I think I will get clowned by Finland first.

Seriously what videos I should watch to improve defense and attack skills.