I've lived in the vicinity of Portland for almost 50 years and haven't seen as much violence as you did in one week. You must have been hanging in really rough area of town, or just got very unlucky.
I spent 1.5 days in downtown PDX (roughly around the Portland City Grill) recently and my experiences roughly match the OP.
It was shockingly bad. Crazy, violent people "everywhere". Tents covering the sidewalks. There wasn't a parking garage around where there weren't piles of human excrement.
This was staying in Downtown and the "Lloyd District" I suppose it was called. Leaving those areas did seem a bit better, but it was still pretty bad. In the same time frame I was in downtown Newark, Trenton, Baltimore, Detroit, NYC. Portland was by far the worst of the bunch.
