In my mind, the hyper-sexualitty of the fandom results from (at least American )society's largely puritanical and vanilla attitudes.
People generally think using some combination of meta-cognition whereby they organize their thoughts, or they go off the instinctual impressions in their brain made unconsciously by a mixture of prior experience and biology.
As a matter of course, normies internalize the rhetoric surrounding them. When they repeat arguments, they generally blindly regurgitate it by rote, and do not build up logical structures in their own head. This is how people become so entrenched in political, religious, and sexual argument without much lucidity. The confident regurgitation of rhetoric is a rough parallel to an ape beating it's chest, or a dog snarling and barking on the end of a leash. But what's this have to do with the price of tea in China?
Chiefly, most normies don't realize they fit into the social norms, mores, and taboos that guide the public world. There is a level of comfort and security that comes with this state which is almost completely taken for granted. For those who have ever left normalcy, that state of shameless self-assurance is as elusive as it is precious. The anxieties of rejection, both imagined and real, accumulate and lead to a two-pronged self-image. The deviant is a two-headed coin, a face hidden behind a mask.
The facets of self that can be shared in public are, but all else is tucked strategically behind a barrier for personal protection. The "furry community" for many is the space where these anxieties can be temporarily and cathartically released. It serves as an audience from which little judgement can be expected, and what judgement is present is held at arm's length by digital barriers and anonymity.
In short, many go to the furry fandom to escape the uncomfortable normalcy outside it.
Your easiest option is to just give up your deviant interest in anthropomorphism. Whatever the difficulty of that task, imagine forcing a stranger person to do it instead, and then multiply that difficulty by the degenerate population of this fandom. The product of this thought experiment is the magnitude of futility in your ambitions.
You might create a new fandom through diligent gatekeeping, but more likely than not it will either go stale due to low demand, or become subverted or destroyed by those you wish to keep out.
Your second-easiest option is to accept perversion and degeneracy as the norm of this fandom, and then demonstrate the alternative without judgement. You might be overshadowed by an MS paint dog dick, but you might also attract those who can sympathize with your desire for a more-normal expression of the fandom.