Not addressed yet, but if you are talking about a listing agreement or a buyer representation agreement. A listing agreement should have a cancellation clause with any exit fee penalties explicitly described and a notification provision. You might have to give 30 days notice and pay an exit fee. If you are in a buyer agreement, then you can get out easier typically with fewer hurdles. Sometimes after you hire an agent they act and respond differently than they promised. That is called client estrangement. If you just don't like the way you were handled or angry about a specific instance you have grounds for estrangement. Not legal advice! Read what you signed, if you really want out talk to the managing broker directly if the agent is guilting you into staying with him. Understand that the office holds the listing in Illinois, unless an agent is a self sponsored small outfit. Managing broker more interested in keeping business in the office and reassigning to another agent in same office. If you didn't like the brokerage service-advertising, the way they handled appointments etc. you are within your rights to call other agents and get their marketing plans and CMA. If you find a better org and agent, follow the contract terms regarding notification and exit fees.
If you like my answer, thumbs up and best answer me, helps me to maintain my VIP2 status. I dont have a dog in this, and not to interfere with your agent, but you have right to change agents or office. Best of luck!