Hoping this isn't the same movie as the last few where everyone other than Goku now is a trash minion until he gets there and takes over the majority of the fighting. Occasionally another character (vegita / gohan / piccolo / gotenks) makes a distraction long enough to power a spirit bomb.
What?
Movie 7 - The only one that vaguely coincides with your complaint, except Trunks and Vegeta kill Androids 14 and 15 pretty easily once they power up to Super Saiyan. After 13 absorbs parts from 14 and 15, he kicks the crap out of all of them, including Goku, until Goku summons a spirit bomb and absorbs its energy.
Movie 8 - Broly kicks the shit out of all of them, Goku included, until they start feeding Goku their power, which still isn't enough until Vegeta adds his own.
Movie 9 - Goku is dead. He saves Gohan from Bojack and gives him a pep-talk, but this movie is entirely on Gohan. While most of the z-fighters get their asses kicked, Trunks does Kogu in their initial fight, being then surprise KOed by Bojack. Vegeta also goes head to head with Bojack for a bit before being beaten
Movie 10 - Goku still dead. Shows up at the end to help Goten and Gohan, but the work is done by Gohan, Goten, and Trunks.
Movie 11 - Goku still dead. Movie is weird as hell, but iirc Goku doesn't get a cameo for this one, this one is all Goten and Trunks
Movie 12 - SSJ3 Goku is able to defeat fat janemba, both him and vegeta get their asses kicked by super janemba and have to fuse, whereupon the beat him easily.
Movie 13 - They all get their asses variously kicked by Hirudegarn. Gotenks is able to make him take a second form, SSJ3 Goku kills him with a Dragon Fist after Trunks cuts off his tail
So yeah, Goku is the main protagonist of DBZ, it's no big surprise that it would generally come down to him to save the day. The non-saiyan z-fighters are sorta just trash minions, but they've pretty much always been that way throughout the series. Tien and Piccolo have their moments of glory, Piccolo in particular saving Goku and Gohan's lives throughout the series, but it's the saiyans who do all the work.