At the beginning of ep.129 there were only 2 minutes remaining in the ToP. Goku didn't attain MUI until the very end of ep.129, and couldn't even sustain it for the entirety of ep.130. The ToP officially ended in ep.131.
IOW, Goku could probably only wield MUI for like 20-30 seconds in real time before he experienced that wicked backlash and powered down. So even IF you're one of those who thinks MUI Goku > Broly, there's no friggin way I can imagine Goku ending this in under a minute, given Broly's ridiculous damage soak+power creep. /shrug