So, if I only have 1hen and 3 roos, should I get rid of 2 roos.?
I don't see any really good solutions.
First step is to make sure you are allowed to have chickens, and see if you are allowed hens only or also roosters. (If you are in the USA, check zoning for your county or city, and check for HOA rules. If you are not in the USA, I don't know what you need to check.)
If you are not allowed to have any chickens, obviously you should get rid of them all.
If you are allowed to have hens but no roosters, you should get rid of all the roosters. But it is not good to keep one chicken by itself, so if you keep the one hen, you should get some other hens to keep her company. Or else get rid of her too, so she can go live with other hens somewhere else.
It usually does not work well to keep just one hen with a rooster. He usually wants to mate so much that he wears out the feathers on her back and generally makes her miserable. (Some roosters can be kept with just one hen, so it depends on your individual rooster, but you won't know about your rooster unless you try-- and if it doesn't work well, then you have a problem.)
So if you are allowed to have roosters as well as hens, you could get rid of two roosters, keep one rooster and the hen, and get more hens to add to that number.
Or if you are fond of the particular roosters you have, you could keep all three of them and get rid of the hen. You will get lots of crowing and no eggs, but roosters will often do well together if there are no hens to fight over.
Each of these ideas has some downsides and some advantages, so I don't know which would be best for your situation, but hopefully one or another will work.