Is the Supreme Court broken?

Does the lifetime tenure and appointment process of a Supreme Court justice hamper that court’s ability to effectively and fairly weigh questions of law against the constitution?

As it stands now, the justices who lean a different way politically than the President hang on for dear life, waiting to retire until their appointed successor will be “safe”.

Presidents who violate the constitution left and right can appoint judges who play fast and loose with the document, and this poor ability to interpret the constitution is institutionalized through the next generation.

The Supreme Court seems like a half-baked idea. Like the founding fathers ran out of steam after the Great Compromise, and just couldn’t design a better system?