*Only responding to the thread title*
I haven't personally encountered any interviews or articles where he said that but, if he in fact did, he's absolutely dead-on.
Nobody actively listening to Drake, going out to his shows, buying his records, propelling him to his current status as an overachieving Grammy-award-winning-two-time-multiplatinum selling artist well on his way to three, and giving him their genuine and full support, gives a shyt about Kendrick. Or his "Control" verse. Or B.E.T. cypher snippets for that matter. Their fan bases, while composed primarily of standard-having music fans, couldn't be any more different.
The difference being, fans of Drake could give a fukk about beef. He's a young, emotional, light-skinned male Canadian rap singer. An underdog and a sitting duck both rolled in one smackdab probably America's dirtiest pop profession, facts even his biggest apologists will admit; trying to bait Drake in 2013 would be alike to someone baiting Eminem right after MMLP: corny AF...he wrote songs, you wrote diss songs. Make no mistake, battle rap is a healthy platform and I'm all for it so long as it's organic and not forced; but there's nothing organic and not forced about what amounts to some B-list up-and-comer calling out artists who're twice as established and successful, in the name of "encouraging competition," , like these artists whose names he's calling out aren't already fiercely competitive to begin with.
It's a dirty game, y'all.
Back at the start of '09, when nobody cared about anyone not named Wayne, 'Ye or T.I., and (a case of the returning old guards) Jay, Em' or Nas, a certain artist dropped a stellar mixtape, with only one famous guest appearance---the outcome? A new era was born. Flash-forward a year and some change later his debut is plastered all over malls across the country. He's the most borderline anticipated and debated new artist since 50 Cent. Only, unlike 50, this shyt just sorta comes and goes and is completely upstaged my a dude who'd been out of retirement for not even a year and conveniently announced his album just months before. Like, completely.
But instead of cowering in some fancy large mansion back in Toronto like a loser he comes back merely over a year later with an actual modern rap classic that's got actual staying power and deemed a wild success across the board, and borders. In the process reestablishing himself and his star power, one he'd use to help introduce a fellow artist by the name of Kendrick Lamar to which he humbly gave an entire song on said sophomore album all in the name of love and brotherhood.
Flash-forward another year and some change later from that release the aforementioned artist, whose music he'd cosigned countless times and even went as far as inviting him on tour then guesting on their album and shooting a video for one of its gold-selling singles, all undoubtedly playing a hand in increasing their popularity, blindsides him with an accusation that he isn't competitive enough and that he'd better watch out all because he had a better received debut and now has some clout of his own.
Kendrick, the starving unpopular artist, who'd once admittedly cried in the studio over a Roots H.I.G.O. instrumental all because his music career was headed absolutely nowhere and execs wouldn't take him seriously, urging other rappers to "rap about life, and not other rap nikkas" has proceeded to call Drake a "sensitive" and "fake" rapper since, to much internet fanfare and admiration.
How this all plays out is to be seen but a few people clearly suffer from amnesia in this thread and it's not just the Drake groupies like Napolean bytch ass.