LHE has swings, it's just not as noticeable as NL and it doesn't happen in big chunks. That's the nature of the game. NL is a cold-hearted bitch. It's not uncommon for LHE players to have 100-200BB downswings. And when it does, it's much harder to get back because you can't just go "all-in" when you hit a big hand. So it's kinda pick your poison.