At the best of times
Definition 1 of 1
Pro Tip 1/3Irony or Humor
Often used ironically or humorously to emphasize how situations are typically difficult or undesirable. 
He's stubborn at the best of times, but during the negotiations, he wouldn't budge an inch!
Pro Tip 2/3Challenging Norms
Implies that the norm is already challenging and any additional factors make it even more so. 
She finds public speaking nerve-wracking at the best of times; today she was downright petrified.
Pro Tip 3/3Adding Emphasis
Used to add emphasis, often preparing for an admission that circumstances have become even worse. 
Traffic is bad at the best of times, but with the roadworks, it’s a complete nightmare.