High uncorrectables after underground drop and inside line replaced, modem signals OK

I'm seeing lots of uncorrectable errors in my modem after Comcast replaced the underground drop from my tap to my ground block.  I was experiencing complete outages a month ago and a service tech identified the underground drop had failed.  I had my electrician upgrade the inside line from the ground block to my 2-way splitter from RG59 to RG6 Quad also.  I've been seeing high uncorrectables ever since.  I called Comcast to escalate the problem last week and had a supposedly higher level Comcast tech take a look at my new lines this past Monday.  All he did was change the connectors on both ends of the new inside line.  This didn't make a difference.  He basically claimed everything was 'Green' on his Comcast phone app.  He didn't test my inside line after changing the connectors.  When I questioned him about this his responses were "you shouldn't expect signals to be perfect", "you'll always have noise" and "you have better signals than I have at home".  He totally ignored me when I showed him the modem levels and uncorrectable counts.  He kept referring to everything being 'Green' on his Comcast phone app.  At this point, I escorted him to the door and he left.  I never had uncorrectables before the underground drop was replaced.  My signal levels are similar to what they were before the lines were replaced.  The distance from the tap to my main splitter is literally 12 feet.  I don't understand why this is so hard to fix.  I've already escalated this problem with no resolution.  I'm at a loss as to where to go next with this.  I will be working from home the rest of the year and I need rock solid service.

My modem is a DPC3941T rental modem.  Signals are posted below.  Last reboot was 6 days ago.

Can I get some help here from a Comcast expert?  Please advise.  Thanks!