Ralph, aside from the fact that everyone saw your gunt hanging out a week ago and it's looking more disgusting and inhuman than ever (you have a butt on your stomach, your bellybutton looks like an asshole, none of it is normal), the reason people think you use filters is because your head looks deformed. It doesn't look normal, you have lumps where there shouldn't be any, multiple chins, no neck, one side is bigger than the other, the whole thing looks sort of like a watermelon like someone else pointed out. It's odd looking, it just does not look right or normal, so they went with the best possible explanation, that it was deformed in the picture because you used a filter that fucked it up.
Instead you confirm that no, no filters, your head is just that bizarre and odd. Again, you haven't lost weight, not in any significant way since the gunt is more horrifying than ever, if you really didn't use filters and your head isn't swollen from the beating you took, you should really get that checked out because you're starting to look non-human at this point.