Maybe it's cause they had tons more levels on me and I'm new. Even then coming from playing a mod like The Hunted, I think the monsters should OP, and not on the same or even close to the level of the hunters. But hey that's just my opinion.
you were expecting(hoping) the monster would be OP, its no wonder you found it underwhelming. honestly i'll have to agree with some of the other posters here, in that the monster is terrifying in the right hands
(the following is not directed at you just sharing my experience with the alpha and my first match)
Finally got to try the beta today and in my first match i was the monster, i didn't know what the hell i was doing in the first few minutes though admittedly that little intro did help. its safe to say that when the hunters found me they quickly proceeded to place an arena trap and took down over half my health without me so much as getting a hit on any of them. after the arena trap went down i somehow managed to escape and recoup. i scrounged around for kills on animals and evolved to level two while getting a hang of the controls.
the next time they found me they went with the same strategy of dropping the arena trap and tranquilizing me right at the start of the encounter. i was ready for it this time though. they found me on my terms this time and i was expecting the arena trap and the tranqs, so i had vantage on them and a great position. i took down the medic first then the trapper. the remainder fell easily. these guys were high level as well, i guess after seeing i was level 1 and destroying me in the first encounter they let their guard down and completely underestimated me giving me a huge advantage.
i had so much fun with the alpha tonight and im sold on the game.