Service has declined over the years and I suspect they are severely oversubscribed. Going through phone support is exhausting. Of course I grit my teeth and endure the reboots, etc. even though I’ve always taken those measures before calling.

They talked me into renting their modem instead of my $500 Orbi the last time. I figured he’ll, maybe it was a scam to force me to pay for acceptable service. Whatever, worth the additional $15. Shockingly, no improvement and in fact it got worse.

Are there commonly accepted diagnostic programs that I can use to find and confirm the issues such that they can’t deny it’s them? Or if not them show me the cause? How do I get them to deliver the kind of service they had no trouble with two years ago?