Tips on surviving:
1) Combine your skills to survive periods of heavy damage. Let's say a melee is on you. If you use Raptor strike (even if it misses, is dodged, parried, etc...), Roar of Sacrifice and Intervene:
- he'll be targeting your pet and will probably waste 1-2 GCDs on it before realizing what happened
- you'll be immune to crits for 12 seconds
- you'll receive 20% less damage from all sources for 5 seconds.
All of this combined will give you the chance to run away and survive.
2) Use Scare beast as much as possible. It is fast, can be used from 30 yards range and is spammable. For exampe, let's say that a feral jumps on you. You use scatter shot. You cast Scare beast, and he cannot turn to human form so he gets feared. He uses Berserk to break it, then you use freezing trap and his berserk is almost wasted because he spends it in the trap. Of course this situation is purely hypothetical, but it shows the benefit of one more CC ability.
3) Use Concussive shot + Tranquilizing shot on paladins. Usually the second you concussive shot a paladin, he'll use Hand of freedom. So immediately after casting Concussive, start spamming tranq shot. You'll remove 1-2 strong buffs and also the Hand of freedom the second he uses it. Then he has nothing to counter your frost trap and will have to walk all the way through it.
4) Use Tranquilizing shot on warriors. This will remove their enrage effects, which especially for fury, can be deadly.
5) Glyph for master's call and use it any time you know you're about to be snared or rooted. This way you'll have a lot of time to move freely and your enemy will likely have wasted a CC ability.
6) Glyph for raptor strike and macro it on mouseover. Whenever you run by players, pets, totems, critters, whatever, you can use your raptor strike mouseover macro and gain the 20% damage reduction.
7) Use your pet abilities to prevent getting damage while not in control of your character. For example, a rogue stuns you. Then you use bird/scorpion disarm ability and for the whole duration of the disarm, the rogue will do next to no damage. Immediately after his weapon is back, use Roar of sacrifice, then he'll damage you but will not get even a single crit and you'll walk out of the stunlock with minimal damage taken.
8) CC enemy pets to prevent damage and CC coming from them. For example freezing a felguard will win you some seconds and force the warlock to use its "pet trinket". Then you can use deterrence to avoid much of its damage and stun and wyvern it or trap it when your trap CD is up again.
Use scare beast on BM hunter pets as soon as possible. This will force Bestial Wrath, while the other hunter may have planned to use it in a better moment. Then you can feign death to win 1 more second and deterrence when the pet is on you again. After BW is over, scare beast again. If you have the ability on a mouseover macro, this can be done even more efficiently.
VI. How to use the pet properly
1. Don't send the pet to attack just anyone.
Most players send their pet to attack always, no matter whom they are fighting. This may cause more trouble than help.
1) You send your pet to attack the priest, the priest fears the pet and you can't use Roar of Sacrifice and all of its special abilities not only for the duration of the fear, but also for the several seconds that it will take your pet to get back from where it ran to.
2) You send your pet to attack the DK and start kiting. But the DK keeps Death striking the pet to heal from it until he finally gets close to you.
3) You send your pet to attack the warrior and start kiting. The warrior charges the pet and then intercepts you, traveling 50yards in 2 global CDs.
4) You send your pet to attack the prot warrior. Your pet does next to no damage to him, but the warrior keeps auto attacking it to get a full rage bar.
5) You send your pet on the moonkin only to find it hybernated.
In all of the above situations and many more, it's much better to keep your pet on passive.
2. Use your pet to taunt enemy pets. If the enemy's pet is on defensive or aggressie, it will start attacking your pet and not you.
3. Feign death early and let enemy pets or mage mirror images go on your pet.
4. Use snake trap and feign death to make it very hard to retarget you.
5. Change pets often. Dismiss pet is only 2 sec CD, and you can summon another pet instantly. So if you see you're against a caster, use an anti-caster pet and not a scorpion for example.
VII. In conclusion
You'll die often in PVP as a hunter. Don't worry, it's normal and often not your fault, but part of the class design. But if you do your best, use all that is available to the class and think in advance, you can have amazing unexpected victories and feel the magic called hunter PVP.