Some people who do routines like exercise may fail in building muscle, and exactly you also need more explanation why such thing happened.
Of course it would stop your motivation, however you are not recommended to stop the routines, and we are here in giving answer and what to do next.
You must first need to see the reps and whether you do it too much or too few.
Surely for adding muscle then you must get more reps, especially when the physical activity you do is rather light.
Maybe you also focus only for protein thus you may forget about the importance of carbs. Carbs in this case can help in building body too.
For the grow of muscle, the good amount of carbs is needed, plus a person always need energy anytime he wants to exercise.
Another obvious mistake is when you practice same type of body training.
Thus a good exercise program as seen in Healthguideblog is ideal to practice, and you can train whole body for sure.
And last, running cardio is always a good thing to do, but some people may do it on wrong way. Thus, they won't get the expected result.
Running cardio won't be needed for everyday, and it's pretty ideal to run it on weekend.