Because I know what a German player's weaknesses are and can speak to them. I can say why I lose and what I lose to. I can say which units I see soviet players using a lot (nerf?) and what units they don't use at all (buff?)
I'm always honest about me playing German in my posts and I put my steam Id on my profile for transparency, something most of the people I argue against choose not to do.
Do I think the patch is perfectly balanced? No, and I've never said as much. I think the changes that need to be made are minor and I tend to only argue against the most hyperbolic, nonsensical, points I see from some of the more aggressive soviet players.
I don't want to sound condescending, but it just doesn't work like that. These weaknesses might be your weaknesses, or you being outplayed. It just doesn't really work only playing one faction, I get its tempting to think you can compensate for any biases but I've never met anyone who that actually works for.
But that is kinda the problem. Your posts are basically reactive, not proactive, about the balance. You said yourself, you are trying here to go against the extreme views of some soviet players, without offering much of your own. That kind of position is a natural consequence of only playing one faction. this kinda opinion style adds to creating the kind of faction 1/faction 2 fanboy mentality that exists on a lot of game forums. its possible to argue against the extreme views of soviet fanboys, while contributing to general balance, rather than (as you would naturally drift towards) a kind of decently argued german fanboyism.