The player not reading guide, or some theory, pvp guide, pve guide, ect... certainly not read the forum, you can't reach this players here. also a lot of player like discovering something without any clue. 8vs8 is so die already, there not unranked 4vs4 games to learn.

it's simple on the paper but need time to paid attention to everything for a new fresh player.
You can't fight this but maybe you can advise new players
Make a macro with a remind of the rules, and some advices, so if you have new players in your party, you use this macro.
i think we have a 1 minute timer before the match begin for give a strategy or give advice after all.