The constant flaming going on from teammates towards other team members is something that needs reworked ASAP. Many of my matches are being thrown because someone flames my team member, the flamed person either DCs or AFKs (which is super understandable...) and the whole match gets ruined.
The changes would not be hard to implement. Stop allowing members of the same team to target each other. It encourages spamming. Also, members who repeatedly cuss out others, name call, and are hateful need to have their ability to speak in PvP completely revoked while in that game mode.