The fact you have to rely on bounties to hype Kidd up a bit after he fought two emperors says everything
On the roof the best he came up with was creating a cage for a homie. His physical attacks were useless since he doesn't have ACoA.
Zoro and Law had to save his and Killer's life and he didn't even show CoC.
Against Big Mom,Law told him repeatedly to stop using flashy attacks right after his own to steal the spotlight and to make the audience believe he was actually achieving something with brute strength. His final attack was a beam that had no effect on Big Mom. They probably saw the bombs exploding and associated those massive blasts to Kidd laser
Hkis awakening grants him the ability to write big Ns and Ss on a target
Kidd is the biggest fraud in One Piece, at least Law actually hurt Big Mom and saved them multiple times. Without CoC