Fix.
Walk through the resolution.
Diagnose tells you what's wrong. Fix tells you what to do about it. Honest guides — per router family, per Wi-Fi failure mode, per cabling decision, per ISP-escalation scenario — written without the affiliate-fishing slant most of the existing content has.
Planned coverage: ASUS / TP-Link / Eero / Netgear / Ubiquiti router tuning (which features actually hurt throughput and how to disable them safely); Wi-Fi diagnosis stories per fingerprint (PC slow but phone fine, drops every evening at 7 pm, the exact 90 Mbps cap); cable and MoCA decision guides; and a complete playbook for escalating a delivery-gap complaint to your ISP.
Coming after the first round of Diagnose sharpening. Until then, existing guidance lives on the blog and inside the post-test diagnostic hints on the stability test itself.