bullshit. heres a list of everyone who kicked gokus ass

Master Roshi (nearly a draw)
Tien (nearly a draw)
Tambourine (kicked his ass bad)
King Piccolo (nearly killed him)
Raditz (fucking died)
Vegeta (nearly died)
Captain Ginyu (nearly died)
Frieza (would have died if not for the yardrats)
Android 19 (even without the heart virus, goku would have lost)
Perfect Cell (Theres no arguing this one, perfect cell was stronger than goku. even goku admitted)
Majin Vegeta (SSJ3 is useless due to energy drain and even if he used it, vegeta would have outlasted him)
Kid Buu (Had to use a wish to beat him)

And then he lost nearly every fight he had in super. Long story short; many people can kick gokus ass