Colchis suffers from being in a very rough spot (sandwiched between Hayk and Arche Bosphorus) with most factions around them not liking them. Their starting province has no unique resource, so their economy starts out poor.

Additionally, their level 1 barracks does not give them their medium Hoplite unit, unlike every other Greek faction whose level 1 barracks gives them theirs; and on top of this, their Hoplite unit is unique, but only in that it is the weakest medium Hoplite in the game. It only has 25 armor, compared to the nearby Pontic Hoplites that have 35 armor and the rest of the Greek Hoplites all having 30 armor.

Also, they have the weakest Pike units in the region, only having 25 armor and no shields so arrows (which are in abundance in the East) shred them. The pike units are also an AOR recruitment unit and therefore, limited in how many you can recruit.

Altogether this makes the faction extremely hard and just not fun as their military sucks (compared to the nearby factions) and their start is poised to be dog-piled by everyone around you.

The faction needs some tuning, move the Hoplite unit down to the Tier 1 of their Greek barracks. Buff the armor or at least the attack of their pike unit so it can be aggressive if it can't be defensive. Maybe tweak the starting diplomacy a little bit as well.