Intermittent packet loss for last month.

I’ve tired everything. Literally everything. It’s not an equipment or software issue. This is happening over Ethernet cables. I’ve tried 3 different ones btw. This started while using xfinity equipment and continues even after replacing the modem. There are no splitters. Just one coax from outside the home to the modem. I work remotely and this is now causing issues with job.  Xfinity says everything looks good because it IS good until it’s randomly not. 2-3 times per hour I suffer extreme packet loss (15-20 %) and then it goes away after about 1 minute. I’m going to have to switch to a slower provider because I don’t see any other options. I’m on the highest package, more than capable equipment and xfinity says “all good”. This stsrted after I received a txt about an Outtage being restored that I wasn’t even experiencing. The next morning I got dropped from a work meeting SEVEN times over the course of 30 min. It’s been awful since. Idk y’all. I guess if your lucky and it’s working for you? Beautiful service. If anything goes wrong anywhere down the line? You just suffer until they accidentally fix the issue months and months later.  Dad state of affairs