In a matter of hours, the Federation literally had one of their largest members near-wiped from existence by one guy with one super weapon. Less than a day later, said guy was minutes away from wiping out Earth.
The Dominion were good at being bad, but even they never managed quiet so much carnage in such a short time.
I'm going to stop you right there because what your describing is at best very vague and at worst disingenious. The Dominion were not about destruction and mayhem they could inflict on their enemies. They were about superiority and control. They wanted to win civilizations over to their side because they believed their way was the best. Almost like the Borg but without the hive mind workings.
And almost wiping out the Earth is somehow a major thing? These are the Star Trek movies. We've been saving the Earth from bad guys on a non-stop basis since Nemises. Everything is about saving the Earth because apparently, Star Trek cannot possibly exist without it. Deep Sace Nine actually made a bold move during the Dominion War when Sisko had to convince the Federation that Earth was not the key to winning the Alpha Quadrant. Sisko, the human Captain just told everyone that Earth isn't important. No other Star Trek 'thing' has ever done that before or after.
As for all the stuff that happened in Star Trek Into Darkness? Its not that impressive when you can describe everything that happens as 'Impractically convenient'.