They lost and I didn't read anywhere talking about dismissing the coach, talking about hiring a foreign coach with great experience, talking about giving power to the coach. nothing changed even with defeat, so don't expect something good to come from Brazil in the next 2 years, it will be the same thing that has been seen, they will have difficulties to qualify for the world cup, and even when they reach the world cup they will have difficulties to move on to another stage and not win the World Cup. You can't be optimistic when you don't see concrete good changes
Today I watched an interview with former Brazilian national team striker Romário. He said exactly what you said and he also added that today's players don't value the World Cup as much as players did in the past. Today they only use it for marketing and to get good contracts. Players don't give their all on the field like they used to. In fact, sports seem to have taken a back seat. If they win, that's fine. If they don't, that's fine too! It's like: it doesn't matter.
It's like Endrick said in another recent interview: 'some brazilian players could be already on vacation (from their european teams), but they have come here, because it was their dream (to play and win Copa America). And they have been training here for 30, 40 days, under the sun'.
For many people it sounded like brazilian players consider they are doing a favour or sacrifice by playing at the national team, having to train under the sun for another month, while they could be already on vacation.
If that is what happens, they really don't care about anything at all! If we read between the lines we will see they were actually concerned about their vacations since the beginning, at that is all... It's contradictory, though, that in the past soccer players had much inferior wages, but played more passionated, compared to nowadays where players have huge paychecks, but don't display any passion for what they do.