It doesn’t. You can almost[1] always opt out of class action lawsuits to pursue your own suit. This would be expensive and unwise for most people, but you have right.
[1] There are rare exceptions.
Courts aren't lacking in budget to hire more people. They're lacking in people available to hire, with the specific expertise that they need to fill any gaps. The legal profession, at least in the US, consistently has some of the lowest unemployment rates across the board. Unlike over here in the tech sector, the scarcity is in available talent, rather than available jobs.
This is humanity vs Mark Zuckerberg.