Hi everyone, I'm new to PokeMMO and just discovered and started playing like three days ago, but I just wanted to say that I don't find any problems with the difficulty curve that has been implemented. It was a bit of a shock to me that I was actually have trouble beating Burgh the first few times, but nothing that can't be solved with a little bit of strategic training. I've been playing Pokémon console games since I was in grade school, and I actually really appreciate the change: it makes it more of a challenge, and the smart AIs/level caps force us to focus on more than 1-2 Pokémon at a time - which allows us to round out our team better than we would in the OG games.
Train a few wild Pokémon that have move/type advantages against the Gym leaders, OP. You'll get there.