A more precise question would be:
Is your RPM lower or higher than in the golden years of 2003-2008?
Those who report higher revenue likely have a lot more traffic now than in past years.
My CTR is a quarter of what it was at it's peak in 2006-2008.
As CTR diminished from 2008 on, EPC rose to kept RPM high - for a while anyway.
But advertisers reached a point where they resisted paying more so RPM started to decline as well.
It would now require a steady growth in traffic just to maintain my former level of revenue - but just the opposite happened to me.
My mistake was just maintaining my two sites - trying to keep them up to date. Google seems to prefer fresher content.
Like it was said many times here on this forum DPAYEi1B (Don't put all your eggs in one (or two) baskets.
Diversify with several sites in different niches with different streams of revenue.