What also doesn't help with that is reading forum posts.

I usually play healers. A while a go I tried the O5S dummy with my ilvl 348 RDM and beat it with 0-2 seconds. I even failed it once because I accidentally pressed the wrong buttons. In the past I did the same with the O1S dummy and no matter how often I tried, I didn't get better than maybe 3 seconds faster or so.

And then there are posts by players who say (just an example) 5000 dps is very, very low and only bad players do so little dps. And there are posts by players who say they almost never play RDM and still can beat the O5S dummy with ilvl 330 with 20 seconds left on the timer.

I don't know at all if that's wrong or if it's normal, but it makes me feel so extremely bad that I only very rarely play a DPS anywhere.