Caldarius’s bleed is less than a third of Kid Ultra’s. KU’s more than doubles the skill’s damage. Caldy’s doesn’t even come close to comparison.
WF doesn’t have a bleed if you take the triple (and the “bleed” he does have is on a much harder to land skill, doesn’t nearly triple the damage of the skill, and does less damage than advertised because of travel time). Furthermore, his napalm augment is incapable of stacking when multiple stickies are launched at the same location, and is something that can be walked out of (whereas a bleed cannot be avoided).
The stun can’t be reapplied to the same target, but it can be applied to another enemy after ricochet, and it actively seeks said enemy out. You can fairly effortlessly stun three people with one use of the skill. Comparing Bola to Blade Rush is just ludicrous.
It is fairly easy to load yourself up with four damage buffing drones. Unlike Kleese setting up his rifts, the damage buff follows KU around wherever he goes. You can prevent Kleese from setting up a network because he’s setting them up close to the battle, and he can’t move it once started. Kid Ultra can jungle and run shards for a minute with no pressure at all as he sets up his ridiculous damage buff. And once more unlike a rift network, which you can avoid, you can’t just outright avoid a player. If you just flee at the first sight of Kid Ultra, then he’s effectively accomplished his goal anyways.
KU would be a well rounded character with Bola doing reduced damage after a ricochet, not being able to stun past a direct hit, and the bleed not making it do 2.6x damage. It would put him in line with other ranged stuns and other auto-aim ricochets. Same goes with preventing damage buff stacking on drones. Even without all this, he has fantastic waveclear contribution, fire-and-forget healing, and a good escape. He performs well even without the ridiculous stuff you can stack on Bola.
There is a reason I refuse to play Kid Ultra since I’ve mastered him. He’s got just plain broken helix options.