heavy-handed — using excessive force, authority, or control; lacking subtlety or sensitivity

a large security guard aggressively blows his whistle while pointing sternly at children who are simply playing normally on the playground equipment. He waves his arms dramatically and appears to be shouting, treating minor playground activities as serious violations. The children immediately stop their innocent games and huddle together with worried expressions. Some kids begin to cry while others look confused about what they did wrong. Parents in the background shake their heads disapprovingly at the guard's overreaction. using excessive force and authority while lacking subtlety or sensitivity in handling a simple situation