"I'm not saying to say it meanly, but find a way to say it truthfully."

Well it certainly sounded like you were all in favour of saying it meanly: "If it sucks, why not say it sucks."

If someone's out of tune you point that out. That's helpful. Saying "You really are bloody useless" is not helpful, and it's very likely not true either.
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Some songs are stories, some aren't. It's always been that way. And you can't draw a line between song and poetry. A lot of great poems would make terrible songs, and a lot of great songs aren't great poems. But there are plenty which are both at the same time.