I am glad with the way they have played in CL.
They don't have good defenders, maybe but I think there are more things from their whole tactics. Like Barcelona, with their tactics, they have never been a good team with records in minimum conceded goals.
It is a bit unfortunate they didn't go through, but for a teams first participation in Champions league, it is a huge achievement. They won't repeat that for a long time.This season was quite a chaotic one and they used it perfectly.
Could've they done more? I think they did, but that's life and football.