I get where you're coming from dude. It sucks but it does get better. I still stutter and I have issues getting what I want to say out of my mouth in the way I want to say it. You're not alone and it just happens sometimes bro. If people make fun of you or think less of you for something so insignificant then they're not worth being around or even talking to. I guess you can't control that on an online environment but just know that you're amazing, and you shouldn't worry about stuff like that, even if it's super frustrating. You're awesome, just keep moving forward bro, you got this.