A great amount find it unattractive - probably. Not sure I'd say most.
I'm fat (obese, and short, so aye I look obese), and get enough attention I'd say. To the point it can be annoying/unwanted. Not every day or anything, though (which I'm glad about, that'd drive me mental).
Would you believe it, it's mostly not fat men that take interest, either.
I'd actually say I get more attention when on the larger scale versus smaller scale of fatness, for me personally. I'm not sure why, though I have some ideas. Nah it's not fetishes, either. Though I'd imagine the amount of attention I get must be because they think that because I'm fat, I must be easy/desperate.
It also depends how you define attention. Throughout my life, fat or slimmer, the amount of men whom have outright asked for my number/social media is not very high. Everything up to, and before that, though, I've gotten semi frequently, I'd say. Most of the men I seem to have interested in me these days is men I've met in person for one reason or another, and already have my contact details - again, not sure why this would be. Maybe the others aren't arsed enough to ask for me details?
Either way, I'd not like any more attention than I get - I'm being most genuine when I say this. How slim and very beautiful women cope I'll never know, hats off to them, it must drive them to despair.