We've all had one of those days where we just don't feel like interacting with humanity.
But, we are social creatures and have to ultimately find a life by functioning in society, with other people. Otherwise, why waste your time? Just go and become a hermit.
Although that's a tad on the extreme side, and most of us aren't going to do that, that doesn't mean we have to like all of our human interactions of put up with them. Just ask these people and animals how they deal with the days that just can't be dealt with.