If snipers and infantry spawning on the back of them are not counters for you, then you do have a problem.
Big one.
What is a counter for you? 2 clicks and squad wiped frontally? Because it seems like that is exactly what you want, seeing how you disregard all hard counters as no counters.
Let me tell you this: denial about hard counters doesn't make them any less of a hard counter.
Bugalov already explained the difference between hard and soft counters. and 2 clicks to wipe a squad is the hallmark of a hardcounters.hardcounters for the maxim are long range dps or AI vehicles.
for the okw that means obers and luchs.
for the ost it means grens spam with lmgs and 222.
These are not available from the start and it does cause some problems early game as the maxim is perfectly able to absorb grenades because it has extra man.