When you outnumber a tank in an area of the map, that doesn't mean you're winning. In fact, if a single tank is holding back 4 tanks, that actually means you're losing. Because there are likely 3 other enemy tanks that are somewhere else on the map dealing damage while 4 of you are messing around with 1 tank. This is something so many players seem to struggle to understand. They get hyper fixated on what's going on in their little world. But while 4 of them are working together to deal with one tank, that tank has 3 teammates that are probably flanking you.
I keep ending up on teams like your first team anymore. Makes you sorry to even press the battle button. Even had a battle with 7 tanks, 0 damage. I hope one day this gets better, it pretty much sucks right now. Great video, glad you made the transition to PC and began making videos. Take care.