No. I like them both. If anything, SM has made me like BW a bit less, because TRio are mostly back to their normal loveable lose selves instead of their Ultra - serious take during BW.
It was step forward step back thing, since while it came at the cost of their personalities, I did like BW was enforcing effortful face-offs with TR for once. I appreciate BW was a series where they 'cut the cord' more often, letting the twerps' Pokemon take damage in battles and make the twerps actually do clever things on their own to win instead of things always being plot armoured to be a curb stomp, which tends to only work when it's outrageous enough to be funny (eg. physics bending over to have Wile E Coyote's traps backfire onto him and never the Road Runner).
Since XY the series seems to have become more against letting certain Pokemon get too roughed up (particularly the designated 'cute' ones) keeping them inactive besides completely one-sided battles or instances they'll be saved before the opponent so much as gets in a hit, which means spamming TR as useless most of the time again. They've also come out with lazier and lazier solutions, Pikachu vs Mimikyu have only really had one fully drawn out battle and even that was the usual 'Twerps Pokemon gets a new move = instant win" cop out ending.
BW at least felt like TR were relevant because they were an actual unnegated challenge to the twerps many times, and even when they started to become comical again, it at least came with the pro of the twerps having funny banter with them. SM gives TR good individual personalities and roles, but their antagonist role still feels superfluous and bland, the twerps don't bounce off of them or remotely develop from them in any way, and any instance it looks like they potentially could, something cops out.
With that said, many complained about BW's main event battles like the gyms and rivals being poorly conceived instead, so it might just be a case of the writers only being able to do so many good ones and having to direct quality control to one particular area.