It was absolutely dreadful. I was extremely depressed, and after a fairly good first semester where I actually tried a couple different clubs, maintained a 3.6 and above, and even talked to a couple girls, my next THREE YEARS involved switching majors twice, not attending classes (like just literally not going , a suicide attempt, zero contact with girls, and shitty jobs bussing at restaurants and expo(ing) to servers from the kitchen. I accrued $20,000 in debt and had a 1.7GPA to show for it. Needless to say, I had serious mental, financial, and educational problems.
I've spent the last two years at a technical school for IT. Turns out it wasn't really my thing either (subject matter was terribly dry), but my depression has become more than manageable and I've maintained a 3.9 GPA and a really fun and educational waiter job during my tenure. It feels nice just to have stayed with something and accomplished it.
So to those who had a bad college experience: life goes on. I can't lecture on if it gets better since I'm 22; maybe it gets worse lol but I know first hand things can definitely turn-around. I definitely wanna go back eventually, who knows when
If you're still in college take advantage of your college's career center. Depressed? Don't let that prevent you from getting good grades, look for any campus counseling services ASAP if not get outside help. Confused? Welcome to the party, either change majors, ride it out and see what the job prospects/real world is like, or drop out (college isn't for everyone, maybe you would be better suited for trade school, military, or something else entirely)
If you're in high school you should be planning for college already by Freshman year and have most of your shit together by Junior year (study for that SAT, make sure your class rank is in top 10%, form a general idea of what teachers you want to write your letters of recommendation, DO VOLUNTEER WORK AND AT LEAST ONE SPORT OR EXTRACURRICULAR, and be prepared to write bitching essays). Even if you end up not wanting to go to college I don't see why you wouldn't want to give yourself the most options possible. In your Junior year of high school you might have decided that you want to take a year break or something like that but in your actual Senior year you might find that hey, maybe you did want to go and it would be a shame if you missed the boat that some of your peers managed to get on.