Hello,
I’m a returning WoW player and I’m wondering which class to play.
In short, I’m one of those 40-year-old dad gamers who played WoW quite a bit years ago. The classes I know from a few years ago are Priest, Death Knight, Warlock, Shaman, and a bit of Paladin. I’ve played at 2k in 3v3 and 2v2, both as a healer and DPS. Of course, I don’t have as much time for WoW as I used to, and I mainly want to play PvP BGs and Arenas (Solo Shuffle, maybe a 3v3 comp sometimes), but I mainly plan to play solo.
While playing which of the classes I’ve mentioned will I be least frustrated in general PvP? 
Which is fairly accessible and versatile for solo play?
And a side question: if I decide to play a hybrid class, is it easy to get gear that would allow me to compete with the average PvP player?
Thank you in advance for your constructive replies