I Built a 2.8KB Cookieless Analytics Tool After Google Analytics Hid 35% of My Traffic (opens in new tab)

Last month my Next.js SaaS showed 1,200 visitors in Google Analytics. AmazeMatrix showed 1,847. That's 35% of my traffic GA simply missed because of ad blockers and cookie consent rejections. I am 20, building from Meerut, and I was making product decisions on broken data. So I deleted GA and built my own. The problem I launched AmazeMatrix in early 2026 with GA4 installed. Three things broke immediately: The cookie banner killed UX. 60% of Indian users clicked "Reject". My bounce rate jumped...