I think that’s a bit harsh. There’s always going to be a lot of people who dislike ringers, even Danny Mac. The trolling aside, Layton has actually done a lot better than other perceived ringers like Ashley. Even Fleur last year, who had much less experience, hit four dance-offs! I love Layton but I have to say I’m not that surprised by his (brilliant) performances just because of the extent of his experience. Whereas with Ellie, even if she had some training when she was younger, I feel like I’m seeing someone grow into her love of dancing and surprise herself, and I know other people IRL who say the same.
Other people’s mileage might vary (and do, clearly! Here and on DS Layton is by far the most popular and Ellie is despised on DS).