Profile of honeymonstis

Just had a game with my opponent spamming 3 panthers but the thing is ZiS will decimate the panther combined with penals if they try to flank. And also panther cost a whopping 18 pop cap and 185 fuel but still can be countered really cost effectively.

so your opponent spend all his pop on TD and lost to anti tank guns? ok? That is working as intended.
The panther is not an op unit that does everything. Its an expensive but very very good TD. It requires more skill and micro to fight a panther than it does to use it. Which is still ok in my view. All I pointed out was that the fact that you have to use more micro and skill to counter Tommies than to use Tommies does not mean that Tommies are super OP.

btw... if Soviet is so .... weak... why does it... have such... a good ... win rates ? better than ost ....?

Sov arent weak in 1vs1 or even team games. Cons are up and have no real clear role however. Sov just use tactics and other units that are not dependent on their mainline inf. Sov have access to some quite op units but that does not make the cons magically a good unit.
Ost is my favorite faction as thematically and stylistic I like the them the most (also reminds me old COH 1 goodness). However Ost is quite punishing with easy ways to lose units and be wiped by explosives. So Ost are a higher tier of skill than some of the other factions in the game but also very punishable by RNG.
Cons vs Grens balance is pretty good. Grens ofc scale better with upgrade and their rifle nades are in my opinion better than the molos. Early and even mid game the cons / grens dynamic is great. But that is where the whole issue comes from. If you buff cons or give them good scalable weapon upgrades they might break the cons / grens balance. But if you do nothing then OKW blob braindead play remains as a completely viable tactic. But if you nerf volks AI then rifles and tommies become an issue again (tommies with early bolster is already an issue).
Fixing cons to be a viable unit against OKW while NOT becoming op against Ost is what the whole thing is about for me.
That is why I think their utility and not outright combat performance should be looked at. Make the molo and AT nade just a part of sov tech naturally. Then with the 7th man in t4 or t3 then cons will have some late game use as well. Right now they are just a too heavily investment to use in anything other than cons focused doctrines or if you got some specific tactic in mind.
Just to show the issues:
OKW: always gets volks.
USF: always gets rifles.
UKF: always gets tommies.
OST: always gets grens.
SOV: maybe gets cons. Most of the time just 1.
I think penals are also to blame for this and I dislike that unit a lot as well. Its a silly unit and with gamey design that function as a clutch for sov inf. But that is just my opinion and not facts.

all faction units cost like this rifle etc (not IS cause IS is BALANCED )

what people means for cheap is the reinforce for a single model cause they still have 80 hp not lower but are 6 so they are cheaper to reinforce

Obers are 80mp pr. model as well so no its not all faction units cost are like 50%.
Sure they have 80hp but they also die easier than other models because of RA. Anyone who plays cons and volks often knows which bleeds you the most and which is more expensive as an upkeep.

Cons should support penals? But penals tough enough and could good fight without cons and with AT upgrade can snare vehicles as well (and you even don't trade your fuel for snare). No one will be build 2 penals + 2 cons. Almost every player choose 3 penals instead.

yeah if you got t1 and have access to penals there is really no need to ever buying cons. Cons are only used if you go a certain doctrine or chose to go t2.
I honestly think that cons should get their utility upgrades for free like grens, volks and so on. So when you got t2 = cons gets AT grenades. T1 = cons gets Molotovs. Or something like that. T3 could add the 7th man upgrade. That way cons could at least be a very versatile unit that does not require the player to sink a lot of resources into to make them so.

"if a unit requires more complex tactics to beat, then it is to use, then that is sorta the definition of overpowered"

so A-moving OKW blobs? Panthers? Heavily armoured, high hp, fast and turreted TD which funnily enough is also decent AI. Stukas? Point and click delete unit which requires the enemy to mirco all their weapon teams / squads or wipe and counterplay is deep diving flanks with AT.
I agree in general with your statement but tommies being able to beat mainline axis units in far range cover combat is not really what I call op. I think bolster comes to early and should be more like the new soviet cons upgrade and only hit the field med-late game.