In addition to defeating strong candidate Bayern Munich, Barcelona also defeated another strong candidate for the Champions League, namely Real Madrid in La Liga, which indirectly Barcelona has a better performance compared to Bayern Munich and Real Madrid, so Barcelona's chances of becoming a contender for the La Liga and UCL titles are wide open if they continue to consistently win, Barcelona must also be able to beat Manchester City and Liverpool who are strong candidates in the UCL if Barcelona can get through all of that I am sure Barcelona will get 2 prestigious titles this season.
I agree with your opinion that Barcelona has great potential to be able to compete closely and of course there is great potential for Barcelona to be able to win 2 trophies at once (Champions League and Laliga.) if Barcelona can consistently win. Yes, last season's Champions League champions could be defeated by Barcelona and a strong team like Bayern could also be defeated by Barcelona and of course this is proof that Barcelona will be ready to win trophies this season.
At this time of course we wouldn't be wrong if we said that Barcelona's performance was better than Real Madrid and Bayern because looking at Barcelona's match against Bayern and Real Madrid which was won by Barcelona then this is definitely strong evidence that Barcelona's performance is better than Bayern and Real Madrid.
It is true that if Hansi Flick's troops can succeed in beating Liverpool and Manchester City, of course Barcelona will have great potential to win the UCL title. However, of course it will not be easy to beat Manchester City and Liverpool because both teams certainly have strong players and when attacking the team it is always very difficult for their opponents to play. and of course in Laliga and UCL, Real Madrid will definitely try to correct their mistakes and Ancelotti is a professional coach and will definitely try to make Real Madrid rise. Yes, so we'll see whether Barcelona will achieve its goals or not and whether its performance will decline or not.