Unless you keep meticulous records, I don't see how you could even say that it "seems" to be harder every year. It may be true, but in many cases it is misconception I.e. your annual results probably fluctuate from year to year and would likely show that you have had a worse year previously......its the whole "grass is greener" thing.
We also tend to change our habits over time I.e. game selection, cashout levels/expectations, software, deposit amounts and frequency. All of these can blur reality.....which is why the only way to know is to keep records.
CM has always had threads and posts saying "things are worse now" and "RTPs have dropped" etc etc since I joined over ten years ago....and yet, the screenies thread is as active as ever, there are still plenty of people winning, and roughly the same amount of people posting about their losses.
So, someone must have been wrong, as if those over the past decade are to be believed, and there's no more reason to believe members today than before, there would be hardly any winners....and probably no players, as the RTPs would be around 20%. As I said, it is all about perception. I know some have used KK's years of records and his decline in.profit as proof of the "the RTPs are dropping" argument, but the decline was a result of higher bonus WR and tighter terms, and much less time being spent "on the hunt". IIRC, even after publishing his declining figures he did not even imply that the RTPs had been reduced. Why? He is a realist and looks logically at the swings and roundabouts he's seen over a similar time period to myself.