It's less the gameplay (which is okay imho) and more the writing and characters that people have grievances with including myself.
Sonic is treated as a cartoon character as opposed to a shonen protagonist.
In other words, Sonic is portrayed as an old guy trying to act cool without being cool.
Roger Craig Smith has never proven himself worthy of Sonic outside the Twitter Takeovers and Sonic Boom.
He does not work as Sonic in my eyes when compaired to Ryan Drummond, Jason Griffith, and Ben Schwartz.
The writers of Sonic Colors were not fans of the character and it really shows during the cutscenes.
The Sonic series lost its soul at Color and didn't regain it until the movie.
I’d blame the writing of the games when it comes to voice work. Roger has shown many times outside of that he’s a real groovingly greatacular Sonic. Boom, Twitter, Ralph, his Sanic has shown to improve over time...now if only Soniku games started to get better with their storytelling in game and not through only the comics
and to make things easier...RCS is the Yuri Lowentha/Drake Bell of Sonic, where he’s great at playing the main hero, but shows it through better products (like how Yuri did better as Spidey in the past 3 years compared to voicing him in Super Hero Squad Online and Unlimited) (and how Drake Bell was superior under the Avengers EMH writing and Marvel Heroes...despite that spot being meant for Josh Keaton...than he did with his own show)
a simp, a sexist, and a singer...good for him