I said this right after the 8-2, Barça will have to fall much further to never be in a title race. La Liga has a very shallow pool of teams that can possibly win the title.
I mean, they most likely would have won last season without the lockdown splitting the season end off; the Champions League Real Madrid came out because they were likely treating the home stretch like a knockout competition mentally.
Atleti were unlucky that their 'rebuild' came in a year when both Barça and Real weren't very good although for how much they spend and the wages Simeone is on, I would've expected more title challenges from them since 2014.
These legacy issues at Barça won't go away overnight but when you don't have many challengers you're always in with a shot of winning when you still have good quality, even without much coherence.