As someone who speaks Spanish I agree with you as a matter of taste, the word feels ridiculous when I say it out loud. Latines honestly sounds roughly as ridiculous to my ear. (Of course even though I was exposed to Spanish at a very young age living in San Antonio English is my first language.)

I have friends who self-identify as Latinx, and use the word, I have friends who say Latine, I have friends who say Latino. Language evolves and I don't think your vitriol is warranted.