What to do with the Scirocco

Hi, I have the 1.4L 160hp Scirocco I love the car but recently it has been nothing but work. She's got 180,000 miles and I've spent nearly £7500 fixing her ranging from suspension to timing chain and all of the related sprockets and belts.

Unfortunately she still has a miss fire and when I put my foot on the gas and try to accelerate sometimes I get no response or a judder, I'm wondering is it worth trying to get it fixed or with the miles it's done and money I've spent just get rid

Thanks