X, you can get a signal booster. But if you plan on staying in the house long if it was me I would rip out all the cable and redo it. Its pretty cheap. I redid all of the cable, and phone lines in my house plus wired it all with Network cables for the computer. Got it all out to the shop as well.
still would like to move within 3 years...we'll see. It's only the basement that is F'ed up. The guy put paneling up around the outside walls and ran the cable and daisy chained behind it. Not sure if it's worth rerunning the cables if I would have to take out the paneling. If I could do it without tearing that out I'd be on board.