Generally speaking Orbi systems are very easy to setup and configure, but you have to have a stable internet and front end equipment and cabling, as well as proper configuration. Try changing WIFI cannels as interference plays a big role in WIFI reliability.
With that said, are you connected to an ISP modem or router or your router? Have you changed out the cable used to connect to the modem/router? Did you reboot your primary ISP modem? If you purchased your Orbi used, and now I found out if from various purchasers, new ones can be returns, it would be good to factory reset the Orbi router and satellites before install. I myself recently purchased a new Orbi Voice and it was previously configured. I could not get it to pair with my Orbi router, until I hard reset it.
