Why is my macaroni salad not creamy?

Not enough dressing:

add a little extra Salad Dressing to bring back the creaminess.

Soaking up the dressing:

Consider adding a little more dressing just before serving

Overcooking the pasta:

Cook the pasta until it is al dente.

Overcooked pasta can become soft and mushy, making it harder for the dressing to stick.

Make a delicious bacon pasta salad in under 30 minutes.