With some(great amount usually)luck ATR's can save you. I was playing an operation against my friend. I played as Germans and he as Brits. I was defending a hill and he attack with lot's of tanks. My few eighty-eight's were able to hold of his advance for quite long time, but due my crappy supply situation(eighty-eight's ran out of ammo) he was able to get to the hill i was defending. My two tank hunter teams were dealing with one of his two Matildas(which they knock out but ran out of AT-weapons), while the another Matilda rumbled towards top of the hill. My troops didn't have any AT-weapons left expect one PzB39 ATR. This puny ATR kept firing and finally it destroyed the Matildas track! It got immobilized in to a position where it couldn't give cover fire for his attacking infantry. This heroic ATR saved me from defeat. I was able to conduct a counter-attack and regain lost my trenches.
Lesson of this story: Never underestimate ATR's