Am I being unreasonable .. this will probably sound dumb and petty

So little background my husband and I regretfully let his uncle move in to help him get back on his feet. We are 27 his uncle is in his 50s. He is a drug addict, never worked or had a job in his life. He finally got kicked out of wherever he was staying and showed up on our door step. We told him no many times until we finally gave in and said he can stay for a couple month eo he doesn’t have to sleep on the street and he can’t do drugs and must find a job. Long story short it’s been way over two months he has done nothing to find a job and is definitely still doing drugs. And we can’t seem to get rid of him.

The uncle grossed me out and makes me extremely uncomfortable. Now this post is not about whether we need to get rid of the uncle or not because clearly we do need to get rid of him. We agreed to wait until he receives some kind of welfare he applied for so that way he has something and then he is out and it’s up to him to take care of himself.

But it’s about we just bought a pool it’s nothing special just a small 18ft. X52in above ground pool. When we bought it we already discussed we don’t want the uncle in our pool. He is disgusting and dirty and it’s uncomfortable being around him. I want to be able to put on a bikini and enjoy chilling in the pool with my husband without the uncle jumping in this small pool making me uncomfortable. It’s our house, our yard and our pool. Is it unreasonable to tell him he can’t go in our pool if he try’s to?

Edit- yes we have talked to him many times about getting a job and rehab. He will not go to rehab or admit he is doing drugs even though it’s obvious. We did try to hook him up with a job our friend owns a business and they agreed to give him a chance but first he needed to pass a drug test he knew about the drug test a month in advance and still came up dirty with meth and heroin in his system. Meth only stays in your system for 3 days. He didn’t get the job