Do McDonald's employee just give you what food they want you to have because I went there for lunch and I got a cold McChicken and an egg McMuffin that I did not order and did not give me a receipt

It sounds like they inadvertently gave you someone else's order. I would go back and talk to the manager and have him to reimburse you for your money. If he refuses to do that then call the corporate office and file a complaint. They will more than likely send you some free coupons in the mail to keep a satisfied customer.

This is not the first time everyday for about 3 weeks they will mess up my order up off to McChicken and they have the slowest drive-thru for lunch everyday

I would suggest checking your order before you leave... That's at any McDonald's. People are people

Yes please do and share your experience.

They probably mixed up your order. I would go into the store and have that corrected by them.

Then I would call to speak with a manager and advise