Well, because either people wanna retain the stigma of Sonic being a punching bag or they don't like him at a high level of power. Whether it's copium about the TailsTube multiverse episode, or 50 Shades of copium about the "infinite worlds" statement from CrossWorlds. Still, everybody is entitled to their takes... bad as some may be.
Though I will admit, those who do so out of spite are a special kind of grating on the ears lol
Agreed no need to appease or argue with those with similar logic to flat earth believers, anti-vaxxers and so on. No point debating against those that be first to tuck tail and run when confronted with Sonic fans/success IRL (seen it so many times) while they spread toxicity online or in their echo chamber "community".
Facts:
*Sonic has a successful movie franchise with a 4th movie (and likely a 2nd TV series) on the way.
*Shadow Generations was both a critical and financial success which granted much needed buffs to Shadow.
*Sonic is having an ongoing crossover with DC, the fact Sonic characters can keep up with any version of the JL and Darkseid, let alone a Chaos Emerald being used as a battery for an engine of universal destruction is undeniable feats of power.
*Sonic literally had to face Death, a nightmare version of Eggman and a dragon that spams black holes in his most recent games (that's not including Roblox, Gens remake and supplementary material).
*Sonic 4 is confirmed to deal with time travel, Sonic Prime was a multiverse story, Sonic × DC is a multiverse story and Crossworlds is going to be about... yup you guess it, the multiverse!!!
At this point, there's only sheer stubborn envy and argument from belief the Sonic downplayers have left. If we lived in a world where you must provide a sound or logical argument before you can have an opinion, the Sonic "stigma" wouldn't even exist but I digress Sonic Scholars.