F=G(m1m2/r2) is pretty good evidence of gravity.
Actually, that's a disproved Newtonian equation.
I'm not asking which theory's explanation is simpler, but perhaps we can debate that in another thread soon. For a force to be acting on falling objects does not require "graviton particles" as you claim. Gravitation doesn't even require "graviton particles". Gravitation isn't even required for a force to act on falling objects to make them accelerate towards earth. You apparently believe there is some other force causing this relative acceleration. Regardless of what this force is, why do you assume it acts on the earth, and not the falling objects?
When I walk off the edge of a three foot drop off and go into free fall while observing the surface of the earth carefully the earth appears to accelerate up towards me. What's the simplest explanation; that there exists hypothetical undiscovered Graviton particles emanating from the earth which allows them to accelerate my body towards the surface through unexplained quantum effects; or is the simplest explanation that this mysterious highly theoretical mechanism does not exist and the earth has just accelerated upwards towards me exactly as I've observed?
I am aware of your belief, I was asking the reason you believe this mystery force is acting on the earth and not falling objects.
An accelerating earth is observed. Gravitons are not. I can see directly that the earth accelerates upwards. I cannot see gravitons coming out of the earth and telling bodies which direction to accelerate in.
Since acceleration is relative, you can only observe acceleration of one object relative to another. Just because you observe a relative acceleration between two objects doesn't mean you can observe which of the objects a force is acting upon.
I can consider the options and come to the most reasonable conclusion. Either we are pinned to the earth by the upward movement of the earth, or we are pinned to the earth by graviton particles.
The upwards movement of the earth pinning bodies to its surface is a known mechanical action. The upward movement of the earth is the simplest answer.
Any phenomenon which comes out of the earth and pulls something down towards it invokes the unknown and is extraordinary. We are under no obligation to consider the extraordinary. If we were we'd also have to consider "intelligent falling" and "invisible fairies did it". Gravitons are an extraordinary explanation and thus cannot be considered as a reasonable conclusion.
When you have evidence for the unknown and extraordinary maybe Gravity can be considered. As it is, an accelerating body can occur through known mechanisms, and therefore an accelerating earth is the best explanation for observable occurrences.