Sitting here it seems fairly obvious. If it is the jammers that are killing the drones, then go after the jammers. Presumably wait until they light up and then get them with whatever can reach them. Rinse and repeat.
if AD is being used, do the same thing.
once no more jamming/AD, use mass drones to swamp the area where you plan to attack, using thermals wherever possible.
Once ready to attack, have loads of drones in the air and as soon as anything is spotted trying to defend, take it out.
im also assuming the US satellites can spot where the helicopters are operating from? HIMARS them.
I would be recruiting 1000s of drone operators, instead of forming new battalions of troops (or as well as).
I am sure I’m missing something though.