What % of live players are douchebags?

[foal]

I went to a casino for the first time last week. The highest cash game was 3/6 so I decided to play a 45+15 tournament with unlimited rebuys during the first hour. This older guy with white hair and a huge wad of 20s he brought out whenever he rebought (very frequently) was surprisingly loud-mouthed and obnoxious. He berated other people's play and gave condescending "nice hand, sir"s. Once he limped on the button, the small blind moved all in and he angrily said I was just being social!" All the staff obviously knew him well. He was probably the worst player at the table too.

Just wondering how common these type of people are at live poker tables.