Who cares if you are the last one to finish. Do the exercises right and then you will see the results. Most of our workouts we do are hard enough. If I say do 30 reps of something and you only get 18 then make those 18 the best reps you can do.
For example, lets say we are doing a C & P ladder. I can't tell you how many times I see clients simply clean the bell and then press the bell without creating any tension throughout their bodies. What are you doing for yourself besides going through the motions? If you only do 3 C&P's on each side but make them your best reps, then you are training smart.
Please don't cut yourself short because you want to be the first one done. Train smart and you will remain injury free and become stronger faster.
Now go get some!!!!