GW2 grind is souldcrushingly long and tedious, as the game not only has far more grind than WoW ever it, it does the grind in a massively boring way, just like GW1 did. You just repeat the same small subset of actions in the same place all over and over and over and over again. I absolutely love their art, which is by far the best in the industry, but gameplay was remarkably boring after a few hours with very little depth and grind was just soul crushing. And I say this as someone who played GW1 for years, where best form of farm was running two instances with a solo build that could be (and widely was) botted.
WoW felt like a game of LoL in terms of speed of character progression in comparison to GW2.
As for WvW, you either don't understand how it works and bought arenanet's lie about scaling, or are intentionally misrepresenting the facts. Sure, you get boosted to maximum level but without gear, you're a useless dead weight. It gives you levels but without all the stats that come from level-specific gear, meaning one properly geared lvl80 can easily drop 5-7 scaled up low level guys and not break a sweat in the process. Done that myself several times on a warrior and elementalist before quitting the game.
Imho if you want to get into GW2, stick to PvE, go through the storyline once and quit. Because once you have done so, you enjoyed all the enjoyable content that game has to offer. Rest is simply about monetizing the wealthy min-maxers who can't be bothered to grind for months of redoing same easy instances for gear tokens, AoE bot the events for karma or botting gold.