Your job is not to chase down people and try to win some epic 1 on 1. Please roll one of the many classes that excel at that.
Your job is to find teammates and support the HELL out of them. Meaning you are EXCEL at doing these things:
1) Putting Guard on people being attacked and taunt their attackers, so THEY can keep on killing the enemy. Force people to attack YOU (your specialty is defense) so your DPS teammates can kill the enemies (their specialty).
2) Slowing the enemy from getting to objectives with your spammable AOES, stuns, push so you can buy time for your team
3) Defending objectives for as long as humanly possible until your team can come back you up
NO CLASS does those 3 things better. However, there are other classes that kill dudes better.
Know your roles and realize what your class excel at, and I think you'll create a more enjoyable experience for yourself AND your team.
Playing a Guardian always puts a smile on my face. Many times I'd see a teammate being attacked by people. I force leap into action, put a shield on him, taunt his attackers, and start CCing/Stun/interrupting his enemies. In many battles that are starting to look grim for my teammate, jumping in and supporting them correctly turns the tides. It's very satisfying. If I was playing a DPS class at those moments, I can't really help them other than try to kill off the enemies faster than they're killing him. Usually my teammate will die, and I would have taken out one of two enemies afterwards. Boring...... but as a guardian, there are many more times where my teammate LIVES because of my intervention and we finish off the attackers.
Anyway for all you Guardians that complain about PVP being sucky for you because you are chasing after dudes trying to kill them... you'll enjoy a different class much better.
For the rest of us that chase after teammates to support them, and hold out objectives for our team, this class is the most fun.
Playing healer is another fun way to support your team, but it's a bit too passive and boring for my taste. Sitting there a healing is a lot more passive compare to throwing up a guard on your team and start mixing it up face to face with the enemy.