Question marks about online blackjack.

Hi all, I tried blackjack at Pokerstars ( also on many netent websites in the past)

It is really clear to me its not fair like in any real casino.

The dealer get so many 10 J Q K A as upcard and i have to deal with 12+10 15+7 while the dealer hits every miracle card they can get.

Even if i manage to get 20 it gets 20 or 21.

Also just now the dealer had 5x in a row blackjack (when my bet was higher then others bets) and 4 out of 5 of my hands started 17 .

This is not RNG anymore is it?

The RNG (imho) applies to all players that are playing BlackJack, across the platform at that time (it also applies to slot, roulette and so on).
So if 6 players are playing at the same time, 3 of them will win what the other 3 are losing.
That's RNG, sadly.

Blackjack might be some of your best odds, but house still has the edge. That's gambling I'm afraid - expect to lose more than you win.