obstruction
A person who acts like they're doing you a favor when they're really just trying to make your life harder for their own joy.
"I'm not being unhelpful, I'm just making you work harder!", Your coworker, when they messed up your project
"I got promoted because I made your life a nightmare!", Your boss, during a meeting
"I'm not trying to ruin your day, I'm just doing my job!", Your neighbor, after they blocked your driveway