CAX30 internet connection drops all day long

You behind on FW:

https://community.netgear.com/t5/Cable-Modems-Gateways/New-CAX30-Firmware-Version-2-2-1-12-Released/td-p/2345147/jump-to/first-unread-message

However you need to get the following corrected by the ISP:

You hav a ton of correctables and un-correctables that should be zeros.

Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

Power Levels are kind of all over the place. Should be with in 3db on each adjacent channels.
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem. Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.

After this has been resolved, then you might update FW.