how can you love someone but you say many bad things about him?

casual talking between me and one of colleagues is about her marriage life.
she's been married for about 11 years.. and what i've heard so many things about her husband, mostly are bad things..
like how lazy and selfish he is, or something immature from someone that been married for that long, or about being irresponsible for his two boys, the last about his jobless for almost 7 months.

i'm really questioning about what kind of marriage that they have.
i'm not an expert to analyze about this situation, but still i cant stop to say that this marriage is not okay.
like when you love someone how can you say bad things about him... it's not right..

i dunno where they're going.. but friend, if you want to make your marriage is going well maybe you should stop complaining about your husband or get some self evaluation.

(i'm too stressful to heard another "story" from your marriage life)