First time feeling bad about how I quit

It's been about 3 weeks, and the other day is the first time I feel bad for telling my former employer exactly what I thought the last few years working for him. When you've been made to feel like the bird shit on a totem pole is far more valuable than you and every step you take should've been away from a toxic work place. I don't regret quitting nor do I regret burning the bridge. I feel bad for taking it out on the company owner who's been stepping out of the picture more and more.