What problems do you have with agents? They can be difficult about your fee, your payment, and other things, and then, of course, they can't remember who you are.
Most agents are okay. But it's a cutthroat world, and agents have to compete to make sales in a fiercely competitive business. So they send out your CV without asking you, or they try to cut themselves in for a too large portion of your fee.
When they go too far, they cross the line and you should complain about them to the regulators like the REC
How have agents been treating you?