@potatoes thanks for the reply. I believe my devices are connecting via 5ghz and are compatible. I've experimented with disabling beam forming and unfortunately that has not helped. Any other ideas?

I have 3 Deco XE75 Pro units in "AP Mode". They are connected to a Mikrotek router via RJ45 wall jacks. All cables are cat5e/cat6. Below is my netework toplogy: The problem: My wifi is very slow. I...