Is Sword and Shield bad?

Basically what the title says, i've been playing since 3 weeks now and im in Iceborne now honestly i have no problems what so ever with the SnS but every person who joins to my lobby says that SnS is bad and i should just leave it already and start learning Charge Blade or Greatsword. But i hate these type of slow weapons. Is SnS is really that bad for endgame content? If it is i would much appreciate weapon suggestions.