Why? What will those 11 days matter to make you 'hate' it?
I understand what he means. Springer deserved to be called up this past September - arguably before then - and he'll probably deserve to be in the Opening Day lineup, but he won't be. And it will be completely obvious why, and completely understandable, just as it is with all clubs when they do this, but none of them can actually say "we're holding him back so his contract is cheaper down the road," they have to pay lip service to the player not quite being ready, or there not being space for him yet on the roster (yeah, he's being blocked by LJ Hoes), that kind of thing.
So in that sense, it sucks, and it sucked that they didn't bring him up back in September, but I completely understand why they're doing it, and I agree with it, because it means there's a better chance that he's helping the Astros win a championship in 2020, rather than helping them go 15-21 next April instead of 13-23 without him.