I've seen quite a few people post that they have disabled a lot of the chat channels. If you cannot see Battleground Chat, then you're unlikely to be bothered by anything that is said in that channel.

Some battlegrounds are more boxing friendly then others. For the most part, try to do the ones which you enjoy the most - which is probably the ones where you're able to contribute more in. If you can queue with a friend who is a healer, so your sole concern is bursting others down, you might be a bit more successful too.

Play to your strengths. You can burst people down, before the other team has an opportunity to react. You can storm a defended node and take it because of your coordination etc. In general, you're better off on offense then on defense, unless you're holding a choke point.

Ignoring the hate is probably better then arguing with the idiots.