phrase

• Act in a way contrary to one's own interests.

  ‘I try my best, but he's his own worst enemy’

  More example sentences

  • ‘Hitler went from being a superb strategist in the early part of his rule to being his own worst enemy later on.’
  • ‘Not for the first time in my life, I had been my own worst enemy, but if people don't treat me correctly, I have to hit back at them.’
  • ‘But you can be your own worst enemy when there's a lot of negative chatter going on inside your head.’
  • ‘I think a lot of the time I can be my own worst enemy.’
  • ‘The team were their own worst enemy as they squandered numerous chances in a nervous opening game.’