ASUS ROG AC 5300 - SLOW LAN

Hello together, I just installed my new router but I am disappointed with the LAN speed. Max I can get from iMAC to my NAS on CAT6 cable is 0.6GB and it should be 2GB.

My setup is Switch control on - Bond / Link Aggregation enabled. Rest on the settings side is disabled.

Anybody can comment on this or give some helpful hints?

THANKS