This is my opinion: I don't think this movie is terrible but it is pretty bad. If you differentiate the movie Bad Moms (the first one) and this. This movie doesn't have any morals to learn and is really disgusting. Like in Bad Moms, there is a scene where Amy (Mila Kunis) had a little mental breakdown and realized that she is still a mother of two and need to become better mother.
Life of the party is different because there is not even a single scene where it would be a wake up call for Deanna and she literally forgot all of her responsibilities. I thought after she mess her ex husband wedding up she would at least feel bad like "what am I doing?" or at least her daughter is going to question her. Finally, I'm going to talk about their characters. This whole movie lack a lot of lines. Like we don't really know about other characters rather than Deanna. We don't really know about her daughter or her friends and to be honest you could actually see empty spaces in their conversation because other characters like her daughter's friends doesn't have that much line.
Let me give you another example, Like the movie "Pitch Perfect" there is A LOT of characters but because of how good the people who wrote the scripts filled up the spaces, we never realized how some of the characters only have a couple lines.
Other than that, I think the movie is not that bad. The dumb jokes is actually funny. Their acting is not that bad.The part where the dance battle was going on is actually really enjoyable. I still think the director could do a better work though. It's not worth a second watch and isn't memorable at all.