He's not good. He has trouble getting basic tech down in the most watered down games. He mows down scenes with a massive drought of competition and not actual games, he has never risen to the occasion against actual adversity. Noticed how none of the people he's beaten are legends you probably know about? He's never slain a Daigo or a Hungrybox or a JDCR and he never will. Best be glad ZeRo got cancelled and that he doubled out from that exhibition match because even four years of training wouldn't have been enough if Gonzales kept at it seriously in that time frame. Goichi is the closest and he's obscure enough I hope I even spelt his name or remembered it correctly. I could swear the highest echelon of DBFZ players are just wallflowers from games or Melty lifers and that he was one of them.
SonicFox is like Ryan Hart, he's good at picking his fights and sustaining a legacy of being better than he actually is. He's marketable because this is the world you all earned for yourselves by prioritising sweeping categories over actual character traits, allowing shit like twitter and reddit to dictate private gatherings of would be competitors. For better or worse a few of the cancelled folk are more than their one stupid mishap from a decade or twenty years ago that they'd never make nowadays (and I realise this isn't all of them, but I'll die on the hill that friends and those in their circle will judge them better than e-strangers.) and yet it is so, because the imperfect human category isn't marketable and "annoying... you know," as you put it, is, we get SonicFox.
He's not the only 'legend' to cement his fame on a highly hyperbolised and glamorous looking play or gimmick, Daigo's full parry was in a set he lost and I'd bet many kiwis in this thread could perform it consistently if I taught them how to. Yes and I know he had to make the read under pressure... The luck made it more spectacular than the skill involved, really. It's flash, it's flair. But SF is the only one to have never actually climbed a mountain I consider worth climbing or who hasn't came out on top in something madly stacked. I'll be fair with him, Daigo himself hasn't been as consistent in modern times as even Infiltration but it's his very early legacy and a few standout highlights do enough talking for him. He may be the second most overrated fighting game god anyway. The Fox? I don't know, chief.
He's not Knee, JDCR, Leffen, Hbox, Armada, ZeRo, Kuroda, and I'm trying to honestly think of a recent 2d fighting game player that's won as unstoppably as those but I am drawing blanks. SFV and T7 are very inconsistent at top level versus their prequels anyways.