@Jojo42, CPEs are designed for directional links over long ranges, thus they are always used pair-wise in PtP or with a base station WBS210 in PtMP sceanrios. CPEs don't perform well with standard clients due to their directional antenna which concentrates RF energy in a very small beam with just 65° (H) / 35° (E) angle.

If you want to serve standard clients using a Pharos device, try WBS210 (or WBS220 in your country?) with either omnidirectional antenna TL-ANT24010MO or sector antenna TL-ANT2415MS. The sector antenna needs exact alignment for its antenna beam width which is 120° at 6dB) / 90° at 3dB. This means that for ~30m horizontal coverage the sector antenna must be mounted ~10m apart from the clients. Clients leaving this small zone will disconnect from the sector antenna.

If the WLAN area to cover is small, I would use an EAP225-Outdoor wired to the router rather than a Pharos Wireless Broadband CPE.

EAP225-Outdoor even gives you AC1250 capabilities. An N300 device such as a CPE2x0 will be more sensitive to interferences.

@Jojo42, could be that the local CPE sees more foreign APs.

APs and clients always listen to WiFi traffic so they can decide when to acquire AirTime. If the local CPE sees more traffic then the remote CPE does, it will acquire much lesser AirTime and thus the throughut decreases asymmetrically.