I'm experiencing the same problem with https://steamdb.info, except nothing suggested here fixes the issue; I've tried switching user agents to Firefox, turning off tracking protection and content blockers, and turning on compatibility mode (for the last one, the captcha disappears after a while, but then the page refreshes and goes back to the captcha page). I've also tried clearing caches and cookies for the website to no avail.
Somehow, it works when opening the page in incognito mode, although my use case for the site makes it inconvenient since I need to be logged in.