Glad you started this thread, actually
First, I would like to say that I am struggling too, but I have only played 20 000+ hands
There are few things to take into consideration, I think:
1. Not everyone is winning. Only about 10-15% of poker players brake even and even less are getting profit. The money has to come from someone, right? Someone has to be a fish after all ♦ At the moment I am still the fish, for example. You think that all the users of PS are winning!? Think again.
2. Most of those "in 30k hands from zero to hero" stories are exagerrated, to say at least. We had a story in news that a guy made a 300 km journey in 4 hours on a pushbike averaging 70km/h. The fact that he was riding behind the truck was hardly mentioned ♦
3. It takes about 40k hands just for variance to even out - I have played 25k and KK still has higher win percentage than AA and I am miles under the EV graph. If someone says that they made through 3 levels in 30K hands, they are just lucky and when they will realise that at NL25 or NL50, ten it is going to cost them much more than for you and me at NL5 and NL10
4. I have tried NL2, NL4, NL5 and NL10 on three different platforms and I don't think there is much of a difference in skill level. If anything, I think there are more fish in NL10, because it is a rounder number and its easier to place bets in 0.5 and 0.10$ chips.
All in all I wish you good luck because I do know how you feel.