Real reason the Russians are getting fucked is the VULCANO ammo.
6 inch CEP
The panzer 2000 and similar fire a sustainable 900 VULCANO shells/hour and has counter battery fire radar.
Completely wrecks Russian arty which can't handle the range and the precision.
Non atcmas Himars has lower range than Vulcano, only has 6 missiles, worse CEP, far more expensive.
The real difference is the VULCANO 155mm rounds that can be fired by just about all modern Nato cannon tubes.
HIMARS are good and make a much bigger boom than a Vulcano but the sheer numbers of Vulcano compatibile platform make it the silent MVP together with a couple more similar high precision 155m rounds.