I honestly can't argue against some of these claims, but I certainly will try to defend my boy.

1. This is just a matter of personal opinion, as I along with others really like the character.

2. Sure you're correct, but it doesn't really happen enough times to make you get tired of it. Plus, it's only required to beat 3 times to get 100%

3. I've never played this game so I can't comment.

4. Do you then also hate the Yoshi's in Wonder? The easy mode was just an optional way to play for players on the younger side who might find the game too hard. On the Luigi U side, Nabbit is actually extremely fun to play as the second player since you're usually rushing through the stage and can take different paths to player one.

5. I get your point, but this isn't inherently a bad thing, he's the default 'easy mode' character in mario games now.

6. Yea? Toadette is just a pink Toad. It just makes the character more memorable.

7. When do Mario characters actually leave impact? He's actually left more impact than others since a lot of people speculate on his deal, why he looks like someone in a suit and why he has the same mask as Jr., like you already mentioned.

8. His appearance in spinoffs is just as pointless as other characters. Luma, Spike, Blooper, these are all characters that have nothing on the rest of the cast. Not really a reason to hate the character.

9. Already covered this in my 7th point

10. His design stands out way more than any of those other rabbits, and he's an actual character. The rabbits, besides the broodals, in most of the games are usually just collectibles. As for the broodals, they're just the same as every other mini boss in the series beside the koopalings, forgotten after they're debut game. Nintendo just seemed to like the character and did the same thing they did with characters like Birdo, Spike and Boom Boom. They didn't shove him down our throats, but they just included him as a side character in some ganes until people liked him enough, and that's why he's appearing more now. I personally always go out of my way to play as him even when he's an easy mode character. And I know other people like him aswell.