Well, Naruto was not that bad, it was still enjoyable at least for me at that time before the pairings became canon. There were some minor problems like the SNS final battle, Kaguya, etc.., but it certainly did not make the series worse. Everything would have turned out okay if only Naruto ended up with Sakura or not getting married with anyone at all.
The SNS terrible final battle and Kaguya being one of the worst final villains of all time were more than minor problems