Recurring T3 timeout

Hi there,

I have a recurring T3 timeout that noticeably impacts how my internet operates after it occurs (certain things will not load or take an extended amount of time to do so etc.)

I have had technicians out in the past who say I am at the end of the line in my apartment complex meaning it could be numerous things at any of the other boxes for other buildings that is triggering it. I subscribe to Gigabit Pro and do get my advertised speeds. I have a customer owned modem/router (Netgear CM3000, and Asus BE96U Wifi 7) which I have replaced the CM3000 after my internet has been having issues. The last time I had a tech out he rudely and ignorantly told me "I don't care what your equipment shows, I am here to look at the line and that's it."

I then explained my equipment is simply showing that something on the line is wrong at a certain point of the day and it conveys itself by showing a T3 timeout as well as some uncorrectable error codes on certain channels. He then doubled down and said "I don't care about your equipment or how good it is, I am going off my tools, that's it."

Basically I have had numerous techs come to this place over the last 7 years and only once a Comcast rep that sees over the PNW market actually ordered a node split because we were "over subscribed." As a long time Xfinity customer I feel absolutely helpless and defeated at this point. None of the techs want to do the work that clearly needs to be done in this instance which is taking the time to sort out where this issue is actually stemming from. Instead it is dismiss the customer, do the bare minimum when it comes to a tech visit and bank on someone else eventually living here that won't notice there's a problem because they only stream Netflix.

Signal levels are all within spec: