I don't hate Obama. I just think he's an awful president. In some ways the worst president the United States have ever had.
As for the hacking, there is a building international consensus that cyberattack is a
casus belli, but it depends on effects of the cyberattack. If country A hacks Country B's air traffic control system causing two planes to collide, most countries would regard that as a
casus belli, the same as if country A had launched an anti-aircraft missile.
Breaking into the DNC's emails would probably not rise to that level (unless you can demonstrate which Americans were killed as a result of the hacking, or something of similar gravity).
I get it. You're butt hurt. Your candidate lost and you're grasping at straws to make yourself feel better. I am unconvinced that the leaked DNC emails swayed large numbers of American voters. The FSB (or SVR or GRU) broke into the email server, which is a violation of the law. If we can catch the individuals who did this, I'd be all for prosecuting them. By way of comparison, FSB goons
murdered a Russian dissident with polonium. The
goons got away and Putin refuses to hand them over to the UK for trial. I don't think the US will ever get their hands on the Russians who broke into the DNC server. That's why I said this is an area in which an ounce of prevention is better than a pound of cure.
I am all for investigating this, but do not be disappointed if either (a) no conclusive evidence will come to light implicating Russia or (b) conclusive evidence will be found, but cannot be released in public because it will reveal sources and methods (the Coventry Conundrum). Either way, you're going to be left unsatisfied.