p90x is hard

Am i a WeAK? or is p90X is just effin hard?
okay this is my first time doing p90x ( shoulders and arms only)
i made it to the half video of it but i gave up cuz my arms is dead..
i can lift 30-35 pounds dumbell but doing what the video is telling me to do , icant barely lift a 20pounds or 15 lolz i was doing 13pnds all along…
but it really gives a good result..
No, p90X is harder than regular workouts. But they work
P90X- Part 2