I'll put it this way. I've never had issues in Paris with people. I won't say every occasion is perfect but usually have no problems.
The issue 99% of the time is people come to Paris thinking it's an amusement park or big museum forgetting that it's an actual city where people live and work. Being in a city people are in hurry, like every other city.
And they don't know the simple basic aspects of French etiquette.
Say hello when you enter a shop, say good bye when you leave (preferably in French). Not doing these two simple things gives people the impression that French people are rude because French people think you're being rude.
Now for the city itself. It can be disappointing. It's a bit dirty. Bit smelly. Lots of tourists... But overall still a great place to see and be in.
You just need to go with the right attitude and you'll enjoy yourself.