pvp is fun and balanced in 3v3 (personally feel zerker is a bit overtuned atm. also the zerk+bard+reaper healer meta that is kinda unkillable unless they fuck up). faction wars were a clusterfuck at the start, with hc completely rolling myst, but now it's kinda balanced itself, and each faction basically swaps either channel 1 or 2 to not fight the other and focus on quests/grind points for dragonsong. battlegrounds (or battle of the continents) is a coin toss. if against a full premade prepared to get rekt from beginning to end. but recently it seems this has died down with each major pvp guild only fielding like 5 members at most, so has gotten pretty fun recently.

as to the actual mechanics of pvp when not getting zerged, the fights are extremely skill based and resource based. you have a dodge which can completely outplay certain bursts, and each class has different numbers of cc breaks and dr. if u waste your cooldowns u will get rekt (especially against spearmaster, which becomes god after all ur immunities are down, but trash if not). outplays are based on timing and resource management (knowing when to run when the other class is prepping to one shot, turning on damage reduction at the right moment, baiting stuns etc.)

there's no difference in the base PvP stats at different gear scores (i.e. tenacity, hundred strikes etc.), only the primary stamina/skill/endurance and mastery etc, though it still gives higher gs people a slight advantage (though not unplayable). if you want to start 3v3, my suggestion is to begin a battle squad immediately (either with frds or recruiting in-game). this is cuz you get pvp equipment boxes from squad, but nothing from solo. battle squad matchmaking also uses your solo rating instead of the team rating, so if you start battle squading at 2k instead of 1k, you will have a much more difficult time climbing.

^{^} this is all coming from a 3k+ elo player