Rather than risk offending those you work with, stay away from profanity, and express your thoughts in a more professional manner. To move forward, you have to be noticed. Management likes shakers and movers, and they are invariably the ones who end up getting promoted. This behavior creates unnecessary tension - and resentment. Troublemakers who undermine their own team cannot be trusted.
Most customers leave companies because of lack of concern.
Make sure you are never the cause of ill will between your company and a customer. When it comes right down to it, they are the boss. And they can fire everyone in your company by taking their business elsewhere. There is no shame in missing the mark occasionally. Be sure you take ownership when it happens, however.