The matches are supposed to be quick and they are, The problem is there seems to be no requirements for overtime.

One side has 79% progress and the other has 2.1%? Overtime.
Both sides have popped the checkpoints and are evenly matched? Overtime.
Both sides are below 50% and but 4/5ths of one team is KO'd when the clock hits 0? you better believe that means OVERTIME.

Not only does it mean matches that run out the clock are always longer it also makes OT basically meaningless because even if you die during it you can still respawn so there's no danger element to it. Just end the match at 5 minutes and crown whichever team popped a checkpoint/has the highest progress the victors.