Scrolling for an hour - sounds like you're trying to scrape the site to collect comments with usernames? In that case, the page gets pretty large because there

Scrolling for an hour - sounds like you're trying to scrape the site to collect comments with usernames? In that case, the page gets pretty large because there is actually a lot of content in the DOM. It's just not designed for your use case. And, just to make that clear, it's a violation of the terms of services and of some national laws (including the GDPR) to collect user data, you may want to tread carefully.