If not even a guy's own mother talks good about him, it's a bad sign right?

My sister is on the verge of breaking up. It seems like a toxic relationship. There were several signs neither my parents, her close friends nor other family members like about that guy.

Also, they were dating for 2 years and only spoke with his mother recently last week. The mother described her child as lazy and the only one that doesn't give any grandchildren, (she has 3 other children, all 3 are married with kids and stable jobs) that has no priorities in life, nor goals, keeps having short-lived relationships and that she lent him $500 that he hasn't paid her back for a year.

So if even his own mother isn't talking great things about her child, it's obviously a bad sign right?

If not even a guy's own mother talks good about him, it's a bad sign right?
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