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sorry not wanting to sound rude but with what ingame experience do you justify that statement? looking at your playercard...
i've spammed maxims since they were buffed myself and i've spammed MG42s. i don't think i've actually run into any maxim spammers recently but soviets don't seem to be very popular at the moment and the people i have run into generally went for cons; some of them also went for snipers and penals.
anyway, the reason i don't think maxims themselves are the issue is because OKH have rifle grenades and OKW has incendiary grenades and quick lusch or 251/17.
rifle grenades by themselves are not very effiecent at killing maxims, especially if the number of grens is less than or equal to the number of maxims, but together with something else to do the actual decrewing (mortars, MG42, 251/16, etc) the rifle grenade is quite effective at forcing maxims off, particularly if there is a squad there to threaten capture of the weapon.
OKW can generally get a volks squad close enough to throw an incendiary grenade and then the maxim has to move. the 251/17 is risky, both because it tends to shoot the ground and because the zis is in the same tier as the maxim, but it outputs a lot of damage when it hits. the lusch will absolutely wreck maxims once it comes out.
while maxim spam is very effective from buildings or in narrow areas where they can layer, the same is true of the MG42 and the vickers. the maxim is more mobile than the vickers or the MG42 but outside of buildings it has a smaller arc and it suffers from motorcycle pathing.