It's demo with timer. It's useful only to destroy trucks.
Obers don't need close range DPS since they melt everything before something reaches them.
But still you can get STGs. With STG they are Shocks+Grens at once.
Beacon? Really? This is advantage?
Just good at shooting infantry? And Paras are good vs vehilces?
Go back to the game because you don't have much experience right now.
Its a demo thats useful for killing the truck that you are complaining about and obers definitely have their advantage but you rarely see more than 2 unless its a team game you also have riflemen who have their smoke grenades for 15 munitions that can stop obers or the flak truck shooting at you forcing the oberkommando west player to move up his obers and out of cover which they are probably in, you have countless players giving you advice yet you dont try any of it if you wanna know how to counter the thing then why dont you play as oberkommando west in 1v1 and do what they do to you and see how other players counter it
Edit: each paratrooper cost 28mp each obersoldaten cost 50 mp , paratroopers with lmgs cant beat obers in a 1v1 if both are in the same cover type but if the paras can pull off a successful suppression they can win with 1 casualty I tested the suppression ability with my friend and it wont suppress fast enough if the obers are in green cover but in yellow it doesnt matter
It takes 2 demo charges from the paras to take out an aa flak truck so if you have 2 paratrooper squads and a rifleman squad it will cost you 105 munitions to take it out (rifleman need to pop smoke on it) and speaking from experience in multiplayer when I had to face the trucks alone ( I mostly played team games) 3 satchel charges from penals will take the truck out and if you dont have them then about 2 demo charges from engineers
Now earlier you said paratroopers suppression ability isnt that useful well you must've used it on units in green cover and if you paras died then they werent in proper cover themselves