Qatar seems to me by far the worst team that participates in terms of quality? The players are used to playing football in the heat, other players from other countries have that less. They also have the home crowd behind it and will be hugely motivated as this is probably the only World Cup they will ever be allowed to compete in. In the group with the Netherlands and Senegal and Ecuador, there is still a group where you have chances. The Netherlands seems to me to be the winner of the group, Senegal is the 2nd best but Qatar has the advantage that they play the opening match against Ecuador, they could still win if things go well.
With home advantage and fans are also going to behind them for this mega event as most chances this is only world cup for them or most chances as FIFA is going to increase number of teams than they are able to qualify again in future with these all advantages most chances they will be able to have one or three points against Ecuador because currently these both teams are level in quality and having chance for home team with Senegal is recently won AFC cup, and they have few quality players with this they are not going to allow them for having any chance against them and Netherlands is surely going to top this group with this all just Ecuador can allow them for this honor.