God, no! It took, I don't know, 20 years for 4-4-2 or 4-3-3 systems with a flat four to finally appear in the lowest leagues. Forget about that modern stuff.
Coaches at the grassroots level are extremely conservative in Germany, even when they are relatively young, i.e. in their late 20s. Coaches actually have to have a license which has to be renewed every couple of years at a training course with theoretical and practical lectures. So they in fact do know about modern tactical advancements and even learn how to implement them in their coaching. They just rarely do it...
The coaches know they would have to teach their players totally new stuff, because, frankly, 80% of Germany's youth players are coached by their dads or the dad of a teammate, who simply can't teach football. They have no idea how a flat four at the back would work. Then there's also the factor of the "Altinternationalen", as I call them. The old guys watching every home and most away games of their local club from the sidelines, paying 2.50 Euro for the right to shout and insult everybody who moves. They too don't understand modern football and are the first to attack the coach if he dared to implement new things they haven't seen before. It can be a nightmare, trust me. By the way, the leading people of your club (i.e. the President) may be Altinternationale, too, which only complicates the whole matter.
To cut it short: In most rural places here in Germany you are best off playing a variation of 3-5-2/5-3-2. Everybody understands it, no one will question your tactical integrity, even if you lose.
Just to give you an example: I play in northern Bavaria at the 10th level (of 11) and two out of the 14 teams in our league (called "A-Klasse") play a flat four at the back. All the others play with three and a Libero. And one of those with a flat four was hilarous to watch at points. They had a young coach who gave this a try, but he had to use his classic "Manndeckers". So he ended up with a total idiot at left back. The guy had TONS of room in front of him whenever they had the ball because we always dropped deep. But he never crossed the centre line because the ball was his biggest enemy. It was hilarious. And painful.
So yeah, no Gegenpressing in my league anytime soon
Btw, I laugh about this and criticize this because I consider myself a rather modern football player who is, sadly, surrounded by dinosaurs and teammates who don't even know how to defend space let alone have the vision to find you 10 metres next to them