Why would you even climb up to 700 medals at iron age? it doesnt even make sense. And even if your suggestion would go through and get matched up against only iron aged players since you're in iron age.... how would that actually even work? u'd get even more frustrated trying to find players to attack.
I did the mistake and went up 700-800 medals at classical age and made a thread about it and WhatWhat suggested me too focus on building the nation before trying to compete with higher leveled players, and drop down in medals. Beside the game would be pretty stupid if you can climb to the top at the earliest stage in game lol and have it easy.
My suggestion, if you have a great amount of time to play, keep attacking players and upgrade you walls while your other buildings are getting upgraded, you wont get far at 700, you'll have players like me zerg you're whole base for easy resources lol.