Trying to speak objectively, Lamar's music is massively popular, especially among young people and particularly the demographic of a huge number of top football players. It's certainly "art" because it's creative and is a real representation of the thinking and reality of his sub-culture. It's as much that as Lee Greenwood's "God Bless the USA", just from a different perspective that I can't say is invalid simply because I don't share it. Personally, I can respect his work as art even though I don't enjoy it as music.
But I will say it's noteworthy he was featured and got to perform the songs he did, because I don't think any performer at any of major televised event like this has ever come close to being as "traditionally offensive" as Lamar is in almost all his work, including in these songs. Presenting this to a broad, cross-over audience like this is pretty amazing.
I think it's entirely possible the lip syncing and poor sound quality was intentional, to make sure certain words were clipped and that there was no chance the broader audience might understand the lyrics generally. His stuff including these songs doesn't have just one or two "naughty" words in it. Objectively you could say they're highly provocative pretty much all the way through.
It's almost funny thinking about the difference between Lamar's and many of the players' outlook and expression and that of a large part of the viewing audience. It's definitely worth a chuckle.