100 to ten How is this possible?

t2 rush is getting stronger but can still be overwhelmed with amassed and well placed t1 rushes. as long as one does eventually t2 in economy, gradually diffuse t2 into t1 armies, and remember orbital, t1 is great. honestly, t1 also gives more punch going through a teleporter, most noticably with its anti air units. gone against another early inhabitant of a planet, your t1 should give a better shove.

As others have said, if you think something funny was going on, check the replay. you may find they just expanded faster, picked more "spam worthy" build order. Indeed, it may be that their base was totally undefended due to this spam, and a well placed strike could have sniped their commander.
But, this game is also hard to get your head around, so maybe soon you will find yourself being the one doing the swarming