The court system is better suited to protect individual rights than congress or other forms of elected government because its objective is to serve and protect the people based on interpretation of the constitution rather than being influenced by public opinion like most elected officials who are driven to satisfy the public who elected them. An example of this would be an issue with the 1st amendment where somewhere comes under public fire and are trialed for the words they said. The court would simply look at the case from a purely constitutional lenses and come to a decision that aligns with the constitution despite the parties involved.
I would agree that the Supreme Court is a sort of anti-democratic part of our government because of the amount of governance that each judge possess and for an unfair amount of time. The fact that the judges are appointed rather than elected, leads to the judges serving more for the capitalist rather than to the workers. Additionally, it makes it difficult to become a judge because instead of instilling yourself with the people, to have a chance at being appointed, you have to be in good favor with the president when he appoints judges. The fact that they serve indefinite terms that only end when a judge leaves, it also leads to judges overstaying their welcome on the court, and them losing touch with the law. Ultimately, the appointee system is very unusual because it stands out from our democratic government and should be replaced.