Russian Bias = Coping for massive skill issue.
Ground RB: Most russian tanks have only 2 advantages over western counterparts: Frontal ERA packages resulting in a better frotal protection and low profile picture. Every russian MBT up until T-72B3 and T-80BVM have abysmal fire controls compared to most western vehicles.
The T-72 transmission is their greatest liability, slowest my a GREAT margin compard to every other vehicle.
Russian MBTs had the slowest reload times, except T-80BVM wich now has a 6s reload instead of 6.5, while T-90M sits at 7s (for comparison: Abrams/Merkava/Leclerc: 5s (ace), Type 90/Type 10/TKX 4s, Leopards and Ariete 6s (ace))
Every russian MBT if it doesnt have a ace crew have a 80% chance of dying to fuel explosion, 99% chance of being destroyed if the ammo is hit.
Every advantage a russian tank has is easily countered by a well placed shot, and a well placed shot is the core of Top Tier GRB
BMPT was indeed a stretch being placed at 10.3 (put there for sales, its good for the business), however the only reason they had such a great win rate was because they were spammed, also people still dont know how to shoot and also leave after 1 death. BMPT is just as easy to destroy as any other RU MBT with again, a well placed shot.
BUK-M3 even tho has a great rocket is fairly easy to multipath, probably easy to notch at longer ranges. Also as most multi-SAM with only ARH missiles, cannot hit helicopters consistently (since rotor blades are not modeled in radar idk how to explain this), IRIS-T here does everything better.
Helicopters: Ka-52 cant even be used anymore since the adition of IRIS-T
Mi-28NM can easily be countered by Beam Riding/SACLOS launchers, and multi SAMS can intercept missiles, but a lot spAA players are too greedy for a kill that they forget that they should also take out missiles.
CAS: Kh-38MT: easily countered by an IRIS-T, CS-5A5, NASAMS, CLAWS and even smoking your position and changing locations after smoking, but that requires awareness, which 70% of the players lack at top tier. If you see a kill feed with 6 teammates destroyed by a single plane is a team issue, Gaijin didnt add spAAs just to sit in the lineup. Same story with LMURs
Aircrafts: MiG-29 platforms rot in rust, arguably worst plane you can have
13.0 Su-27/33: before ARH missiles were released had 3 advantages: HMD and R-27ER nad TWS. However the airframe was complete bottocks, if you didnt manage to hit all your ERs you would have lost all your dogfights. Now they face most of the times 13.3 premiums and 13.7 ARH missile carriers, where F-15C, F-16C, Su-30MKK, J-10/11 etc completely outshine you, not to mention Su-27 RWR.
13.3 Su-30MK AMV, a cahsgrab vehicle, too strong at 13.3 but remember thre is Su-30MKK which is even beter since it has 6 PL-12s at 13.3. Every 12.7-13.0 plane is a scarifice for lvl 12 premium bots
13.7 Su-27SM: arguably one of the worst FOX-3s (R-77s going limp after 12km if the targets takes a turn) at that BR (compare to AIM-120A/B/C, MICA-EM, PL-12 etc) if you dont get into close range with it you are cooked, at least you can dogfight now after the flight model buff
Su-30SM/SM2, very good planes, with finaly a usable FOX-3 beyond 12km but just because they are good doesnt mean they are unkillable, or because there is Russian Bias, every other jet at that BR can do the same thing a 30SM can do (Rafale does it best)
If you’d get better, you would see that is extremely easy to counter russian vehicles, so easy in fact that I finished Japan tech tree in less than 2 weeks with Type 90 farming T-80U-E1s and BMPTs, and having a >2.0KD in Sweedish Leopards, even in M1A1 I have a 1.8KD and it was back when I was still learning the game.
Crying on forums wont get your skills up, nor you will have a better experience fighting Russia