Uses for red wine vinegar

I like to substitute red wine vinegar for half the balsamic vinegar when making balsamic vinaigrette.

This is hands down my favorite use for red wine vinegar! https://food52.com/recipes/11458-chicken-in-red-wine-vinegar-sauce

secretkitchendiary.com

Sprinkle generously on any bean or lentil soup, and on hearty stews, before serving.
Toss hot potatoes with it when making potato salad.
Make these fried eggs (!): https://food52.com/recipes/25625-roger-verge-s-fried-eggs-with-wine-vinegar
Also, remember that vinegar keeps forever, so there's no rush to use it all up any time soon. Have fun! ;o)

Wow. Red wine vinegar is a major workhorse in the kitchen, and answer to your question could make a good sized cook book. It is excellent in salad dressing, combines well with pretty much any sort of vegetables, good for deglazing pans and glazing potatoes, an excellent ingredient for marinades and barbecue sauces- it goes on and on.