I hear this a lot in my own art school, and I'll be completely blunt because trying to protect your feelings only hurts you, those complaints usually come from either lazy people, untalented people, or people who were told they were so good until they faced reality. Going to art school in NYC, literally the biggest cutthroat city for art students, I have come to these conclusions and I talk about it with my friends a lot... I don't know you, but I'll rant for you now haha
Lazy people say this a lot! What I mean by that is that they are lazy in the sense that they never practice at home or out of class. They do whatever is assigned to them but never try to improve and grow their skills, they simply do what is required of them and then wonder why they don't improve and then complain to the heads of the department that the assignments are too tough or too many. Pretty much they just wanna do as little as possible.
People with no talent say this, which is unfortunate because most of the time they have never been told "no." They have just gone through their lives thinking they're good or hoping to get better but it just doesn't happen. Yes, you can learn art, much like you can learn how to swim but not everyone can become an Olympic swimmer. Art is a skill, you can nurture it as long as you want and you might get good, you might not, but bottom line is, some people just will never get it no matter what they do. There has to come a time where you have to sit down and really think about it, if art is your calling or if it's going to be a waste of money. I have seen people get kicked out of art school just because they don't cut it... it looks a little harsh but more likely the professors are just looking out for you, after all you don't wanna end up in debt an an useless art degree working as a bank teller because your portfolio is not getting you jobs or gallery shows.
Then comes the precious, little, untrampled flowers. I guess we can lump them in with the untalented people, but these are different. These people don't know they have no talent, they think they're good and refuse to see the light of day... until they realize that they are not all that (unless they are a huge egotistical asshole who scoffs at every critique they receive). These people just were never told right from wrong or have a huge support system at home (monetary or artistic). I don't think this is you, I think you recognize you are not growing as fast as you would like so I'll move on from this point.
Thing is, art school is not there to teach you but to nurture your talents, most of the time you are given instruction but you have to figure it out yourself. The language thing... art has no language, you know what looks good and what doesn't and even then you can ALWAYS go on YouTube and check out some awesome tutorials or find artists on Instagram and Tumblr. You have tools at your hands, SO MANY tools! So yeah, art school is more like an academy rather than an institution, what I mean by that is that in an academy you grow by yourself and by your own talents with some instruction rather than an institution where you are taught by a professor. If you really don't feel happy where you are you can always look for a transfer or bust your ass and learn as much as you can on your own to create a badass portfolio. You can do it, you just gotta work really hard at it!