Yes. you could say 99.99% of the Southern Galaxy was destroyed by Brolly who was in a Restricted form. Restricted being in a Psuedo-SSJ Form caused by the Control Circlet that Restrains his power and prevents him from using his full strength. Which would indicate that an Unrestrained Brolly could do far more with less effort and have far greater results.
so wait broly is a galaxy buster?