LBR20, I think my nat type is strict and i dont know how to fix it

My sense is that there may be two completely different issues.

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Jakoee wrote:

 wifi connection is terrible to all devices except my Nintendo switch which is mediocre at best.

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This has absolutely nothing to do with Network Address Translation (NAT).  It would help to know more about which connection is being described:

• Do devices within the home complain that the WiFi signal strength is too low? (few bars? slow speed?)  This typically shows up on some sort of Network Settings display.
• Or, is it the cellular LTE connection with the network provider?  Perhaps the router is not getting a strong signal from the radio tower.  Is it located near an exterior wall? The LBR20 includes two connections for an external LTE antennas which should boost the LTE signal strength.  Might be useful to check page 145 of the LBR20 user manual.
  https://www.downloads.netgear.com/files/GDC/LBR20/Orbi_LBR20_UM_EN.pdf 

The default condition for Netgear routers is strict NAT.  Every device on the LAN is hidden behind NAT.  Minecraft is one of those situations where the customer is advised to forward specific ports through the router to their local machine in order to play specific games.  This might be a good starting point: https://www.hostinger.com/tutorials/how-to-port-forward-a-minecraft-server