Give it a couple weeks. People are just upset because it's new and they aren't use to it. If there are real problems, SE will fix it.

As of now though, the only issues are:
- not enough people are using the markets/retainers (or on new servers even have access to them)
- not enough people understand the system
- not enough people have the mats/crafts to sell anyway
- we could only really be level 20/had level 20 content. Most everything you need pre level 20 the game hands you/can be bought cheaply from an NPC.

Or basically, growing pains.

Once people start to level, gather and craft full bore on each server, the markets will be much easier to use and they will offer different volumes of products.
This past weekend, was mostly about inventory management for Legacy Servers (selling old products to gain room for new) and just getting market/retainer access on New Characters/Servers.