I just realized something!
The last little while, I was thinking "so what exactly did I think about before I knew about transition?" You know, cause a lot of my energy is spent wondering how I might deal with future idiots or how I should have dealt with past idiots. But when I really thought about it, I remembered what took up a lot of my energy. I worried a lot about how my grandpa treats my grandma. I obsessed over how to deal with idiot customers. So what, really, is the difference between worrying over transphobic idiots and abusive or rude idiots? Same deal! Common denominator is that I spent time worrying about how to either control other people's actions, or control how they think about myself or other things. I tossed my worries about my grandpa aside and just stopped seeing him when he gets abusive, and I don't deal with customers anymore because I have different jobs now.
That's good news to me! Because that proves that I can let stuff to do with other people stop bothering me if I can get my mind into a different place. I've done it before. So surely, I can reach a place where I care less about transphobic fools - whether that's by getting further along in transition and successfully going 100% stealth, or, by focussing on other things.