I think its the splotchyness of her tan and the greasyness of her hair it just makes her look so unkempt, along with those wild catepillar eyebrows. even without makeup and a fresh face she looks dirty because of hyper pigmentation around her mouth etc
I do feel slightly bad for her if she has gotten some botched ass filler, she was never stunning but now shes bordering on british bulldog territory. and unsure if its true but I've heard so many horror stories about the stuff they use to dissolve filler, it's not as simple as just getting an injection and its done :/