-Take away the HEAT ammo
That's literally it.
It's complete RNG and if you take any more than two hits in this shit mode then you're lucky. Literally just take away the HEAT ammo so people take more than two hits and don't die in half a second. It's not fun wiping someone off the map in one shot, and it's not fun getting wiped off the map in one shot. The tank isn't some RPG drive-bye shooter, it's an arty. This gamemode is literally a worse version of Karl, and I see no reason to play it for the rest of it's stay until the HEAT gets removed.
WG doesn't care though, and this obviously was never tested because anyone can see that the HEAT ammo is better than the HE in every single way except for long-range shooting, WHICH CAN ONLY BE UTILIZED ON TWO OF THE MAPS IN RARE CONDITIONS.
Unreal, and such a buzzkill.
Source: https://www.reddit.com/r/WorldofTanks/comments/hb5iv8/an_indepth_guide_about_whats_wrong_with_the/