While banks have many negatives it is incorrect to say that they do not bring some positives. By acting as an intermediary they facilitate numerous transactions that otherwise wouldn't happen and this stimulates the economy. The most obvious one is how they use savings to facilitate loans.
Why do you blame the banks? Bankers cannot act on their own. They always cooperate with the government. They have a common goal. Make this world for the rich. In their opinion, most people should be poor. Such people are easier to manage. They want people to have enough money only for the most necessary. It seems to me that cryptocurrencies are now going the same way. I have never trusted and will not trust any banks.