Double ketty start is pretty fail IMO unless you are pretty good with ketty pushing. It leaves you at a disadvantage combat-wise and you will lose too many engagements. Lost engagements means lost men and squads which costs far too much reinforce. Really, you're shooting yourself in the foot as soon as the game starts. In response to Sniper starts, you need 4 man squads ASAP. If you already have Marders, JP4s aren't really necessary. Try a doctrine other than TD as well. Luft can be very handy for Wirbels, which are sort of unique in what they offer PE. JP4s and Hetzers have their role taken already in quite a few PE vehicles but mobile suppression is not found in the PE arsenal and can be very effective against the Sov blobs. Especially in the game you teched T3, Wirbels would've been more useful.
Not to mention, Dann practices all the time and challenges himself to get better. You can see a marked improvement because he is often playing (losing) with people higher level than himself but learns you new tricks in every game. It is especially good to learn tech paths and counters by playing someone better than yourself.
