RBK53 Connection issues. Help me get it working, last attempt before return.

I really want to use the orbi but after returning 2 products that were faulty in a row. I’m starting to get annoyed. I’m on my third now and might have to return this one too but I thought I’d give another reseller a go because I just thought it was a “bad batch”.

I’ve turned to this forum in hope of changing some settings could resolve the issues. Although when spoken to support on phone when describing the issues that I had with the first two and this rbk53 they said it was most likely faulty.

Here are the issues= 

• Refuses to stay connected over WiFi wirelessly, I keep getting disconnected when watching YouTube over the wireless connection.
• Satellites go to blue and then to magenta repeatedly and refuse to stay connected with the router.
• Satellites can be blue and then as soon as I connect to the wireless network they go magenta.
• slower speed than what I should have, around 170-300 mb on a 1000/1000mb fiber line. This is standing right next to the router.
• connected via Ethernet seems to work fine, but think I’ve gotten disconnected there too.
• Being in the settings of the router and changing settings is slow.
• getting disconncted immediately after finishing the load to connect.

Tell me all the possible setting I should try and change in order to resolve this, btw I live on a farm so there’s no other WiFi nearby. I just really want this system to function properly. If it was working correctly it would be my number one recommendation and go to. But it’s just not functioning right. I mean I’ve tried 3 different rbk53 systems and they’ve all been faulty.