Exhausted

For a frame of reference, I work in management of a retail company and it's so exhausting this time of year. Whether it's you're doing your absolute best and it's still not enough for your team to the customers being literally insane. It's been just growing to be too much for so long. The work is truly exhausting with never enough people to get done what's expected. It's not an option to bring up to my significant other because he gets so upset at how he can't help me more with my situation at work and then we just end up in an argument. I just feel extremely disconnected from everyone and it's making me both physically and mentally ill. What are some things that help you through this time of year? Anyone else feeling this?