The man is a raging alcoholic who threatens the West with Nuclear destruction at least twice a day. He is especially fond of threatening all things UK. Perhaps they seized too much Oligarch money and property.
A well-known fact amongst all Russians is that he is an imbecile and only kept around as a placeholder.
My pet theory is that Medvedev inherited Vladimir Zhirinovsky's speechwriters. Even if it's not the case, he's filling that niche of a warmongering clown. A lightning rod role, compared to whom Putin looks like a restrained strategist.
A well-known fact amongst all Russians is that he is an imbecile and only kept around as a placeholder.