I hate people who make excuses to be lazy and unproductive or people who make excuses for being obese and unhealthy.
Why do you hate when people makes excuses about being lazy or unhealthy?
I hate it because it's their own fault.
It's not right to assume that someone is making excuses related to their health or activity level, and you also shouldn't say negative things about someone's weight. You don't know what people are going through, so I suggest that you keep those sorts of thoughts to yourself.
I just don't like hearing it.
Instead of finding the negative in people's situations, you should dig deeper and find the reason behind their behavior. It's not an excuse to hide behind, but usually people act the way they do due to some trauma or bad experience in their past.