Emotions/rant

Is anyone else getting upset at work easily or anything else? I'm a manager at a restaurant and I've found that I have less patience then I use to and I get upset over little things. But I also feel like my boss only nick-picks my shifts or what I do, I've worked for this place for 5yrs and usually when my boss gets this way there trying to get you to quit. They already know I'm not coming back after I leave but honestly my boss makes me want to leave way before that. I have a fellow comanager who also shares the same opinion that they are nick-picking my shifts. Sorry this ended as a rant but it's aggravating and I tend to overthink, obsess over things like this, and I'm trying not to.