i believe that is matsuri

well at matsuri there is a time thing

if you exceed that time while waiting you will get match up with someone random who has been waiting like you

so if you want to match with more people around your level try to not exceed the time

also if you win at matsuri you will be matched with a higher level peep

if you löse at matsuri you will be matched with a lower level peep

i hope it helped

and yeah game is unfair lol