How are you so sure that Qatar can beat Ecuador easily especially Senegal, from FIFA rankings Senegal is ranked 18th and Qatar is ranked 49th. This difference shows a very significant difference, that statistically the players are of different quality.
I must admit that Qatar's football development has progressed quite significantly, they played well in the Asian tournament as well as in the Arab Cup competition, and Qatar is the champion of the AFC ASIAN CUP 2019, Qatar can overthrow Japan with a landslide score of 1-3.
Nevertheless, Qatar's chances of qualifying from the preliminary group stage are not easy. I'm not sure they can overthrow Senegal let alone the Netherlands.
we agree, there is no guarantee, anything can happen as long as the game runs 2×45 minutes. However, Ecuador is also not a weak team as we think, Ecuador can play Brazil with a draw, against Argentina with a draw. Ecuador remains to be reckoned with.
The main idea comes from the fact that Qatar wasn't ranked 49th and they were MUCH lower back in the day, I do not remember where but I wouldn't be shocked if I learn that one point they were 100+ ranked. So that means because they got much better, maybe twice as good as they used to be, or even better, that made people from Qatar or others have some sort of trust in them.
Doesn't mean that we would have to see something like that in the long run, doesn't mean they will beat Ecuador or Senegal, they will most probably lose, I would be willing to wager against them easily, but people who like them end up seeing that improvement and started to have some belief they are better than how they are normally.