AP-client bridge latancy problems

I just replaced some 10±year-old APs that have been a point to point bridge with a couple of line of site Hawking antennas. The bridge works I am just getting 50% bandwidth loss. I was getting about 10% with old set up. When I add a wireless ap (tries several with the same result) to the client side of the bridge the activity light on the client AP goes crazy with activity with no clients logged in. Think I should replace the antennas also? Any suggestions would be great, Netflix no worky with .16 Mbps wireless to my Amazon fire stick.