PTP connection using LHG 5 ax and LHG 5 ac

Hardware
1

Hi folks!
I am experiencing severe performance and stability issues on a newly deployed Point-to-Point (PtP) link, and I am looking for some guidance on how to properly troubleshoot or adjust the configuration/alignment.

CPE: MikroTik LHG 5 ac @ RouterOs v6
AP: MikroTik LHG 5 XL ax @ ROuterOs v7
Distance: 3.6 km
There is direct LOS between the 2 devices.
I did align it using my Apple phone compass and the best Signal strenght i get is -75.

Found this tool on the internet and as per it connection should be good and stable:

image
image1122×286 61 KB

Before this, on AP side i was using SXT SA5 and connection was fairly good (although sometimes slow pings were showing up).
So i decided to upgrade the device on AP side , but now im stuck with really poor connection.
Im a beginner in PTP and mikrotik setups and would appreciate any help and advice.
Thanks in advance!

2

What tool is that for the calculation?

3

UISP design center. I think It is some tool dedicated for their products, but it did the work for this purpose.
Im wondering if the difference between standarts and routerOs are the issue for the bad connection. (thhere is some connection between the LHG ac and LHG ax)