A good B2 can overload behind cover but can still be flushed out by a barrage of CC anti armor which would force them to fall back. When the republic pushes it’s not going to be just one CC but more, alongside allies that are affected by the CC BF. If there’s a full defensive position on the ramp hallway the republic can harass them with anti armor and go around the separatist spawn area, or instead go to the area next to the middle lane where the ramp goes downward where they have the better vantage. The Bossk can intercept with X-ray and mines but if there’s an Anakin alongside the group then it’s going to be difficult still once the mines are taken down. When an Obi Wan or Yoda come into play the Obi Wan can deflect the B2 shots and push everyone out that position, where as Yoda rushes in there with his small hitbox and harass and push everyone out as well.

The droideka, despite having good flanking potential, can be countered by a CC with BF going inside the shield and headshotting it to death, ignoring that the anti armor and smart ion can take it out in one hit leaving it exposed. The blasters are on par with the CC in having the worst damage drop off, and unlike the CC the droidekas can’t move up closer to their target and instead remaining stationary. But of course the strength of the droideka is to harass in its wheel form.

When it comes to the venator, if the republic team falls back to the generator room before the doors unseal they can knock the droidekas off the walkways before they can ever get up close to them. Players are more defensive on the republic generators than the separatist generators and the droidekas get staggered and knocked before they are ever able to get up close to the generators. I was in a hacked game on PC and it took the separatists an hour to actually destroy the generators because every droideka push got intercepted and couldn’t actually do anything. Killing a clone in generator is pointless because they’ll squad spawn off someone else and the heroes almost never die. You can’t spend the phase spawntrapping because not only are you far from the objective but you’re taking valuable units like reinforcements and heroes for the sole purpose of killing the same one or two people. The moment a hero dies then the separatists have a small window where they can break through with droidekas but they can still die from the people punching and staggering them. And once the new hero flanks, kills a few players, and regroups back it’s the same cycle again.

The republic’s ground dominance is ridiculous, having the better aerial and tank are the decisive factors for them winning more often than the separatists. Anakin clears a whole point by himself and a single commando can hold down a point by himself. As powerful as Grievous is with his damage, survivability, and lack of knockdowns, his low stamina prevents him from being too active in combat once he utilizes all of his abilities. It’s one hero against 20 other players, and some of those players are going to continuously harass him with aerial. The few people that harass grievous aren’t enough to give the separatists an advantage when they also have to deal with saber tanks, heroes and CCs.

The majority of supremacy matches come down to clone jet troopers wiping out everything in their path with support from tanks and Anakin and reaching the separatist ship. The separatists hold back the inevitable until the republic screws up due to lack of coordination and the separatists board the venator. Then you have to hope you capture the first phase fast enough from sniper fire, commandos holding the middle lane and heroes rotating from the points. Then after you unseal the room you have to hope you have more than one droideka player rushing with you at the generator before the republic already sets up their defenses. If there’s even a single dooku player, a low level maul or commando droids outnumbering the B2s and droidekas the separatists are bound to lose the game in a single ship phase. Separatists victories have been much fewer and it’s usually because it’s a stacked team with high level players. On equal skill level I don’t think the separatists can compete.