This is why I don't stick to only one genre.
Pop music is very addictive.
I Gotta Feeling is probably one of the most successful singles with very poor lyrics with the Peas singing "I Gotta Feeling that tonight's gonna be a goodnight." for over a minute.
On the other hand.. A lot of pop songs today have nice lyrics. They are not deep and is very easy to understand and that's the point, that's they're marketing strategy. Since pop has the biggest audience in music, they tend to give the fans very catchy songs that will stick to their minds. Pop songs sell very well.
I don't think We Found Love has bad lyrics, its just that its lyrics are very shallow but its indeed an amazing song.
'4' is actually beautifully crafted and the choruses of the singles doesn't give justice to the whole album.
Kelly Clarkson, Adele, Pink, Bruno Mars, Taylor Swift and some songs of Beyonce have really great lyrics
But if we're talking about music generally, I can say that we still have songs which were really from the heart and thought about. Try listening to indie if you really wanna hear amazing lyrics. On hip-hop we have Kanye West. Tho some were samples, we cannot deny how amazing both musically and lyrically his last album was.