In reality- 1 single person used the word “Dude” clearly in the colloquial sense while interacting with you. The fact that outraged you into a series of ranting diatribes, against multiple people isn’t really on them. If you see ‘transphobia!TM’ everywhere, the world is gunna be a bleak lonely place
Your profile shows a person who presents in quite a typically-male way visually & as this is an anonymous online forum, that limited info is how/why many of your interactions will play out. If you don’t wish to be gendered, be anonymous. I’m a tiger, I’m nothing relating to gender- how I want it.