You've always been forced to use armor runes for the jungle. That's been longstanding. In fact, that's part of why people are usually advised not to try and jungle unless you're at level 30 and have full rune pages.
The dragon thing, yeah. It's annoying. But people aren't winning just off the dragon buff, they're winning because the champions who can get dragon at an early level are also insanely dominant during the early and mid games and get their lanes fed. Don't get the two mixed up, because the dragon giving you an additional 8% of AP and AD at low levels isn't giving a whole lot if you stop to think about it. The only ones who might feel a difference are ADCs, but that's all.
I agree with you that Riot either needs to rebalance the jungle to make it more equally viable for tank junglers, or they need to buff tank junglers to make them more viable in the jungle, but saying it makes you want to uninstall is going too far. Right now it's suffering from the same issues as the season 4 jungle was, that high damage, high sustain counterjunglers reign supreme.
If you played last season there's no reason not to play this one.