With C's and D's, I'm sure that you'll be adept at flipping burgers.
What does getting Cs and Ds through your major have to do with how well you perform at your job?
The grades in your major are the only evidence a potential employer has to evaluate your prospective competency as an employee with the associated degree.
C's and D's indicate you may be more or a liability to the company than an asset---and it's unlikely you are going to get a good job in the field of your major.
If you do get into a company, perhaps you can develop a solid body of accomplishments that will allow you to move up sooner or later.
Well, Idk about you buddy, but I don't want a doctor who got nothing but C's and D's in college to be doing surgery on me. I also don't want someone who got nothing but C's and D's in Industrial Maintenance in college to be trying to fix stuff in the chemical plants.