Their pretty mediocre AT honestly. The penetration is junk, they struggle to break through the front of an Ostheer Panzer IV. Even Elite Bazooka's against an OKW Panzer IV have only a 2/3 chance of penetration at point-blank range. Compare to a Panzershreck which is guaranteed to penetrate an a T-34/Sherman/Cromwell at max range. Honestly Anti-Tank Rifles might even be more reliable than Bazooka's because of their high accuracy and guaranteed deflection damage.
But even if they struggle they are a very cheap squad, and when you combine them with any other tank of your own or an at gun they will give You enough edge over Ur opponent. That is the real problem - they will deal more damage than You basically pay for. Having such cheap and potent units in Your unit mix makes it unbalanced. They can make all mines useless, are cheap to buy and reinforce, easy to vet, get the 5th men and can deal significant damage to tanks on top of being able to repair them. Axis don't have anything like that. When they had much more superior tanks it was fine. Now axis should have access to sth similar in their rooster as well to even it out.