We could talk to him and try to help him fix his playstyle, but I think the consensus is that no amount of help will ever make him a viable DPS in S&V HM or any top content.
Looks like he/she may have been so unlucky to only meet people like you during levels 1-50 hence why he reached 51 without knowing some basics. While I had RPG experience when first starting to play TOR and tried to read all tooltips as they were popping up in the game, I sure as hell learned a lot as well from experienced players who offered kind and helpful tips and answered my noob questions or helped with some tutorial parts I simply missed. Now for some people, it may be the very first RPG game they're playing, doesn't mean they won't be good in future. You weren't exactly "getting it all" during your first RPG experience either.