The vagueness of the constitution leaves a lot to interpretation, the final say on which goes to the Supreme Court.
It is very hard to overturn a Supreme Court decision which arguably gives the 9 justices the ultimate say over important constitutional issues.
Theentrenched nature of the constitution makes it difficult to amend. it keeps the country from making quick changes to important rules as it requires 2/3 majority in congress and 3/4 of states
While the Constitution was designed to limit government power, some believe it sometimes prevents the government from acting effectively on issues like social welfare, education, or climate change.