Been having Jitter issues and weird connection issues - Time Warner Internet

This question is about "Been having Jitter issues and weird connection issues", with Time Warner Cable internet and apps. Hi everyone, i been having some odd issues with my connection. Been having jitter issues usally causes issues with discord/overwatch servers with jitter spiking as high as 23ms. Heres what have been done so far:

2 techs (one supervisor) came to my house (been asking why ive been getting high uncorrectables, supervisor tech wanted to charge me becasue "uncorrectables" are normal and should stop asking them or face fines.

My current modem: Netgear CM1000

I used to had "Antronix Filter, GLF-1002 MoCA filter" installed on the demarcation line before the line spliters in my cable box (first tech approved it, but after 2nd visit supervisor removed it and threaten me with fine, saying that was causing the issue (which wasnt at all)

Not sure what are my options at the moment, any feedback helps.

Been having Jitter issues and weird connection issues?