Nope. I'd say that only having 8 champs at 60 and 4 months of play and you're in Gold means you got pretty lucky. You don't nearly have the equipment or champs to win against people that have level 80+ accounts.

If you limited matches to say be within 5 +/- levels of you, that would decrease the pool of opponents you face to MAYBE 100 out of thousands. There are not that many players at level 60 in gold live arena. Because the next thing you would be saying is that you can't find opponents to fight against. One of the biggest issues in live arena is facing the same opponent more than once. SOME times people lose due to a mistake and they might have a chance to redeem themselves. Other times, they are just overwhelmed by what the other player has. Facing that same guy again is just an auto lose. For LA, that's WAY more frustrating than facing a level 100.

Although there are champs out there that are OP in arena and a nightmare to face. Many times it's your equipment and strategy that makes you win. My advice is to continue to run dungeons and get better equipment.