When you start the game as a new player with a Starter Team like "Kael, Warmaiden, Apothecary, etc." then meeting a Team with "Arbiter, Valkyrie, Krisk, Madame Serris" is the way the game matches you "fairly"...this is very fair....did i mention this was fair? yeah, thats fair!. 

I'm under the impression that for some reason you only get offered this exact team to fight every refresh and if not then the game somehow forces you to attack it, leaving you no chance to ignore the accidental Arbiter team and, well, fight nine other teams close to your power level. Maybe contact support, this is not what is supposed to be happening...

not sure but have any of you considered putting in a bad defense? In that way you stay alittle lower than what your offensive power is capable of handling and get alot more wins with less frustration.