Yep, it's incorrect to conclude the whole league when he's just cherry pick one team.
PSG proven many times they beat top EPL teams lately, Chelsea was just lucky in that match. Fortunately Chelsea qualified for Champions League, we will see their performance among all top teams. I still favor PSG and Barcelona even Chelsea won Club World Cup.
Oh, we don't have to talk about Champions League, in EPL itself, I don't think Chelsea will become a champion in the upcoming season.
I agree with your sentiment but nothing you'll say now makes sense to these Chelsea fans. You can pin point all the facts, cross all your T's and dot all your I's and shit won't make sense to them. Most important thing is that they've won the competition, the least you can do at this very moment is to tell them congratulations. PSG on that day seemed fatigued, Luis Enrique won't blast his players publicly but what I say is correct.