Having a bad day is absolutely fine. Even more than one, consecutively, is still totally acceptable.
In some cultures, entrepreneurship is more valued than others. Still, often there is this idea that, because entrepreneurs “are their own boss,” they should be happy; hence it’s not allowed for them to feel bad. Let alone suffer depression or burnout.
In entrepreneurship, as in life in general, activities are rarely pure fun. Going to an amusement park should be heaps of fun. Yet, queueing for hours to ride a rollercoaster isn’t fun at all.
Entrepreneurs are allowed to feel down and shouldn’t feel ashamed to admit it.