help to find a solution

Setup: I have wired network with users without vlans.A have about 30 wds links to remote user/s (PTP, AP+cpe)
Problem:
Traffic from wired users goes throught wds bridges and slows speed.
Where is the problem?

Sounds like the wired network and your WDS are bridged together. You should try putting the WDS and the wired network on separate subnets and getting rid of the bridge.

-Louis