The reason experienced players get matched up with non-experienced players is because the playerbase is so small. That means if nobody is searching with your ELO, you get matched with someone below yours.
It would probably destroy the walking stuka with one shoot, if it wasn't for the engine damage crit, he heavy engine crit, the main gun destroyed crit, the abandonned crit, after recapturing the walking stuka another abandonned and then it gets destroyed all with just one sliver of health left.
The damage output is kinda over the top, however, since ostheer's early game (especially vs USF) is so f*cked up, you most of the time can't affort teching up so this doctrine is one of your last hopes.
Because I pressed S after my Special Rifle command finished building, but it charged me the cost for the sniper and then the building destroyed itself.