Professors want your writing to be PERFECT!  They have to treat everyone alike. They will not offer any special considerations if your first language is not English, or if your high school English classes were not up to the mark.

This may sound much too strict, but that's what tutors are for. In high school, some students think going for tutoring is shameful. In college, most of the best students use tutoring. It's like being able to cheat, but legally!

Excuses like "I don't have time," or "the tutor will  yell at me or make  fun of my writing," or "I didn't want to go to college in the first place" don't work!  In college it's your choice to succeed or to fail. So, if you really want to be here and graduate, please choose to succeed.