This is a common problem. Recruitment is a competitive business, and recruitment staff are all working to get their commission. I had a similar issue using online CV service. The new CV flags up to many automated searches and systems.
Ideally you want to work with one or two agencies exclusively, for your own sanity. This first stage has invited many of them to contact you.
First, switch your online CV to passive/not looking or take it down altogether for now. Consider putting it back up but with contact details where you are more in control at a later date if the current glut of contacts does not lead to anything.
Take the time to decide which of the agencies that have contacted you are likely to get you a good service. You want to find ones that look likely to succeed for you. You can immediately rule out any that offer you inappropriate work or interviews as they are probably just spamming their "best" offers (which may or may not still exist) without consideration of what you are looking for or would match.
This is much like interviewing your own candidates, you get to pick who you want to work with. Don't feel bad about rejecting agencies for any reason - if you find a particular agency's pushy style or job mismatch annoying, just thank them for their time and say you are looking at some other opportunity for now.
Cut your options in progress down quickly to maybe 2 or 3 agencies that you can get along with and that are putting real offers your way (beware that many will find the exact same positions for you and want you to apply via them, so you will need to track what you applied for and rejected and make this clear to them).
Also, feel free to explore other work opportunities directly whilst you speak with any agency. Any job offer that you discover by your own research is your own to manage and track. These are often more valuable to you in any case. The agencies should only get a look in if they truly have done more work than just trawling the internet and putting themselves in as middle man.
You may find in fact you prefer to reject all agencies and look more actively yourself. But that is your judgement call to make. Good recruitment agencies do earn their money by making good matches which would otherwise be hard to find.