I'm sure lots and lots of people complained about the TVP being nerfed. Most people would reply saying "It's only a 3s nerf" it doesn't sound bad but the tank is [edited]now.
I was grinding the TVP line pre-nerf and when I researched the tank all I had left was to obtain the silver required but by the time I did that the tank was nerfed. The gun handling is bad, penetration is awful, speed isn't even that good etc.
Wargaming did not just nerfed therefore time by 3 secondes they did something else to it secretly or it has more RNG than the rest of the tanks.