CM2000 - upstream Amber light - slow/dropping connection

Power levels are kinda low but with in spec. https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router

You have Correcables and Un-correctables on some channels that should be zero's like the other channels. 

Any Criticals, Errors or warnings seen in the Event logs needs to be reviewed and resolved by the ISP. 

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
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

https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/

Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended. 
What is the brand and model of the host wifi router connected to the modem?