Guys can you genuinely remember when was the last time Barcelona had a great defence in all competitions
It's a wrong question to ask, because Barcelona's playstyle isn't focused on the traditional defending with the backline, but with the whole team. That's total football. If the opponent passes in their own half without interference, you can already call it a bad defending from us (what nobody does obviously), because the pressing from our attackers didn't work and they're the first defenders of the team.
Every defensive line in the world looks bad standing in the middle of the pitch, when the attackers run with speed past you in an 1 vs 1 situation. That is the nature of our tactic, the downside. But we accept it, because we like the upsides of it. So the question should never be about a great defense isolated from the team's performance, because as I've said, you criticize the defence, then start with the striker who didn't press as required. We play a system, players are not isolated on their position, everyone depending on each other here.