It is a feature. The Constitution defines a series of feedback loops with different time-constants:

House: 2 yr

President: 4 yr

Senate: 6 yr

President-term-limit: 8 yr

Supreme-Court justice: ~16 years (per Google for average term)

Constitutional Amendment: Hard. ~13.5 years between updates, potentially infinite duration. (231 years since Bill of Rights was added, 17 amendments since then)

Each of these allows for differing response-times to a changing world. If you're a control-theory engineer, you might view Congress and the President as a PID loop, where the President is P, the House is D, and the Senate is I.

The goal of the Constitution is to ascertain what the people want, in aggregate. This series of cascaded loops helps to serve that purpose.