No, it's not 'terrible', and yes, there certainly would have been as much 'fuss', if it had been a 'lost' Lennon song.
It's also fine if you hate it - I'm sure many do - as I'm sure many like it.
It's not a bad song at all, and no point with comparisons with what the Stones are currently doing, nor what The Beatles did.
It's fine to like all of the above/some of the above/none of the above.
I fall into the first category (for my sins, of which there has been many, and hopefully many...