I'd like to appreciate Porto's incredible effort in the Champions League on the recent weeks.
Because they started the group stage with two losses and even the one against Club Brugge was horrible. But it was such a dedication of them that they won three matches in a row recently and even secured the remaining last 16 ticket in the group. I agree that it was a great answer by them to Club Brugge by defeating them by the same score they lost to them.
They improved their performance after two loses and also received opportunities from Atletico Madrid too. Anyway, they did great efforts first before luck comes to them. Brugge is not a big club in Europe and they are not comparable to Porto.
Atletico Madrid could have still maintained their claim for next round but they couldn't score that penalty. That was the end of their hopes unfortunately. They are even under the danger of not qualifying for the Europa League now.
Atletico Madrid only can blame on themselves for this ending. About quality, they have very good players and their club are very experienced in Champions League. With so many star and experienced players, they should get a first position in this group. Simeone likely gets good support from Atletico Madrid boss but he will have to improve a lot of things in rest of season.
In football, nowadays, there is no life-time job for any coach. Clubs can sack their coaches anytime if results simply are too bad. They mostly don't care about past achievement of their coaches.