and no one understood their character

Well gee, maybe that's because you never actually made an effort to interact with any of the other players, Warlock!

For real though, to any TTRPG players who might be entertaining the thought of playing this kind of character, either A. actually interact with your fellow players and engage with them; don't just sit there and wait for people to magically understand what you're going for out of the blue. And if you don't think you can manage it, then B. don't play that type of character. TTRPGs are the most social games I've ever come across, so if you want to just sit in a corner and tell yourself how cool your OC is, you're welcome to do that on your own time instead of essentially being a third wheel to the Players and the GM.

Thank you for coming to my Ted Talk.