Ethanol will cause rubber not designed for ethanol to degrade over time. It is also an excellent solvent. Whether that is the root cause of your issues may or may not be true. Having said all that I put an NOS fuel pump on my '38 five years ago and the diaphragm is still working well. My car gets a mixture of E10 and non ethanol gas. We have two stations that sell non E but when on tour I usually have to run E10. The main problem I've had with E10 is a sometimes difficult hot start because the alcohol boils off & fills the intake runners with vapor.

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Name your dog Naked so you can walk Naked in the park.