I don't think Ryu got screwed over quite as much as Hayate though. Especially in the beginning. He wasn't the most popular character and even the least popular ninja but he certainly had fans and players. Top in 3 and great in 4 with a flashy and effective style which gave way to utter garbage in 5 when they literally made him one of the very worst characters in the game.
Personally, I thought he was the 2nd worst character in the game until the patch came. He had literally NOTHING but his throw game. But yeah, he was just as good as Ryu, not as "cool" but he got wrecked just as badly if not worse. Hayabusa's only just starting to have it worse in Ultimate where Hayate seems to be getting buffed again.
I haven't even started talking about Ein who's looking a bit mediocre, but that's a rant for another time.
Meh. I think Hayate is underrated, but I've already gone over this with Takeda 5 billion times and I have no interest in discussing it again.
At least Hayate plays similar to how he did in the previous ones, albeit nerfed. You're still working with high string mix-ups and similar animation-guessing games with gap-closing manuevers. Ryu can hardly function as a striker anymore (least consistent crushes ever), really relying only on PP4PK and 34KP as decent warm-up safes. But now 4PK is getting nerfed. Woop woop.
I know their logic is "his striking was reduced but his throws are better now!" Uh, no, they're not. He know has half the chance of landing his high/low Izuna holds, the Otoshi does barely any more damage than Hayate's launch-zippy throw (and gets no height bonus damage for environmental falls or floor breaks), he only had one OH, which was terrible (now he has the guillotines which I'm not going to get into again), and his 46T is just... ugh.
I know Hayate players consider Ryu god compared to Hayate so trying to convince them how idiotic Ryu became is futile, but suffice to say I'm ticked. I understand where Hayate players' gripes are coming from as well, but in my personal view, I don't feel he was screwed over any more than Ryu was.