Problem with bonding

I want to bonding two radio links. I havw two mikrotik rb750G, 2 x ubiquiti rocket ac and 2 ubiquiti m5


I attaced my scenario

Radio Links AC----AC are in 5.1GHZ
Radio Links M5----M5 are in 5.3GHZ

Radios are in brigde mode

I have a bonding using balance-rr and monitoring is arp. I have a static route tu do a ping to each lan. So I decide to do BW test using JPerf but I gent max 10mbps. So I decide to dobw test with only one radio link and I get aorund 90mbps but when I bond radio links I get worse result. So I dont understand. So I change bonding mode to broadcast and I get 20mbps. In other tutorials, they get 110mbps and more but I dont

Thanks in advance
mikrotik.PNG

Can anybody help me? Please

Start by posting routers exports, and the output of

/interface bonding monitor [find]

Did you watch out for CPU usage on the 750s while doing the tests?

How far apart are antennas from each other at each side?