I'm from Ontario and its very simplified in my experience as well. Maybe the problem is the sample audio clips they have are all 'posh', its not how most people speak. Two large examples I can think of that even have their own wikipedia pages are the Ottawa Valley Twang (https://en.wikipedia.org/wiki/Ottawa_Valley_English) and the 'Torontomans' (https://en.wikipedia.org/wiki/Toronto_slang). I grew up in Toronto, and the latter isn't just something funny you see on tiktok, people actually talk that way.