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That sounds about right... I don't really have a rule, I just scroll down until I feel like it and then I take a break and start over

I find myself doing the same, only so far you can scroll before giving up and seeing what's 'fresh'.

I go as far as I can, just blindly scrolling. I stop when it gets too slow or when I've seen too many meaningless threads in a row and start a different way of searching

That sounds like a great approach! I've noticed myself doing the same, it seems to depend on the timing, sometimes there's a wall of low-quality content, and other times its high value and engaging.