Not exactly the meaning of dictator, as I'm sure you're aware.
Nothing fine about that. Or better yet: kicking Al-Qaeda's ass was just as good as Russia kicking terrorist asses in Syria.
Nope. Both of the sides you mention are definitely responsible for war crimes. Sadly nothing is done about that.
Obviously Srebrenica is (rather clearly) an act of genocide. Millions dead in Congo was one of the worst crimes in human history, but strictly speaking, not genocide: they didn't die simply for being Congolese, but they died because the Belgian rulers had absolutely horrific conditions for them to work in. Yes, it's all just as bad as genocide, but it simply is not the same thing, just like the millions of dead Chinese under Mao is a huge crime, but not genocide.
No problem with a military presence in an 'allied nation', just like at least in the 'big bad West' there's basically never anyone serious who has any problem with Russian humanitarian centers in Serbia. Never heard anything bad about it and don't see any problem with it. Most people who would have a problem with something like that are the "oh my god everything is a big conspiracy" kind of people.