I also don't think sacking the coach will improve the situation for Barcelona. Xavi was a good enough coach. However, Xavi's experience was somewhat lacking. But at the moment, Barcelona boss Joan Laporta should strengthen the financial aspects of Barcelona. Barcelona are in a financial crisis. And we don't know when this crisis will end. It will be difficult for Barcelona to build a strong squad unless the financial crisis is resolved.
Barcelona get a lot of young talent from La Masia. And right now I think the only one who can save Barcelona is La masia. If Barcelona can find talented players from La Masia then Barcelona will not have to spend a lot of money to buy players. And little by little, Barcelona could become stronger again.
It's true, we don't know when Barcelona financial crisis will improve, so they can move freely to recruit quality players in the transfer window. La Masia is one of the right solutions to maintain the club interests in the long term, lots of talented players have emerged from the academy, and Hansi Flick can make good use of that. Lamine Yamal is a very relevant example, Hansi Flick just needs to put his trust in them and give them the opportunity to play.
With the minimum squad depth, and looking at the project that is being built by Madrid, Barcelona will clearly have difficulty competing for trophies. Even now, with the competition not yet underway, many predict that Madrid will be able to dominate La Liga and retain the trophy. This is a reality, where Madrid not only looks very dominant in domestic competitions, but in the Champions League too.
Barcelona fans need to provide support for Hansi Flick, and they should not demand too much, they must understand that Hansi Flick needs time to build everything from the start. Xavi has done well in the last two seasons, the trophy he presented will be a valuable legacy, and Hansi Flick will try his best to emulate that success.