Have you ever been discouraged?

Have you started boxing but then got discouraged because you thought it was to hard? In my situation I started when I was 17. I went to the gym and after about a month I started sparring. But, once I started it was like I was sparring everyday without learning anything new. I used to tell my trainer that I need to work on my defense and movement but he would just tell me to hit the bag then the next week I was sparring again. I wasn't scared to sparr but I needed to improve my skills. Unfortunately there is only one trainer around my town so I quit. I went back but it was the same thing all over again. It was hard for me because I love the sport.