-snip- I know the Brazilian national team suffered from political interference and I guess it affected them negatively.
Making football a part of politics is a very bad thing especially for a team like Brazil. It is very unfortunate when politics takes over Brazilian football. They are a team that almost never fails to qualify for the world cup every edition. They are ranked 5th in the conmebol zone and they have more defeats than wins. Corruption can really destroy the Brazilian national team. I see Brazilian players struggling without the support of their football federation. There are rumors about some players who were called up because they have connections in the government. Only famous players like Vini, Endrick, or Rodrygo have no issues and are indeed worthy of being called up.
I can't judge another country football team but I can use my country team as example to any other country football team which is suffering in the hands of corrupt leadership and management. And what is happening in Brazil is happening to many countries in the world. And the following are some of the factors making the country teams to perform poorly in the international football games.
1. Corrupt Management. The money set aside for the development of the club would be shared among leaders and the amount which would have used to pay the players too would be reduced.
2. Nepotism: bringing neighbors, friends children and family members to the football team even though they can't play football.
3. Poor Skillful Coach: When the coach is not good and skillful to train the players and have no clue of selecting players then there will be a problem in that team. And all those factors are faced by many countries football teams.
Definitely right, You said about three main reasons of why Brazil hasn't had good performance recently but don't forget these two factors are what we can see in any country and corrupted management system in the world is what we can see in any country but the fact about Brazil is about their government. Unfortunately, the main reason is their government won't fight with this corruption and instead of that they just keep supporting the people who manage the national team.
That's why I think the main reason for Brazil is having a corrupt government.
I didn't personalised Brazil in the case discussion from the previous comment and stated it clearly there. But used my country experience to reach other countries that having the same thing. And one thing you have to know is that, the Government can't remove those corrupt leaders from the National Football Team because they were strong supporters for the election and he used that to patronised them. And now they are part of the decision making committee in the parliament so it will be very difficult for the government to replacement them unless a protest from the players of the fans.
What are the factors of corrupt government.
1. When the government is not doing what supposed do to help the people from poverty and inflation (weak institutions)
2. poor representatives. Those who supposed speak for the citizens, masses and the poor are in support of the government. And examples of such poor representatives are. The National House Assembly, The Judiciary and the Law Enforcement Agencies, and the constitution is abandoned.
3. Nepotism: when the government has been taken as a family affair. That is all key positions in the government are from the president family.
4. And other Micro-Economic deficiencies are left to the faith of the poor to suffer. Then no public institutions can do well in anything again because all what they do is for the benefit of the members of the parliament and not the people in the public.
I can recalled when Brazil government was good without corruption to this level, the National Football Team was doing well both locally and internationally but things changed probably when the government was changed. And those leaders are not bothered even though the team is n bad shape and all they want is their monthly pay and other allowances. But when good leadership take over things will come back to good again.