In a large bowl, combine the sliced cucumbers and a pinch of salt. Let sit for 5 minutes to draw out excess moisture, then drain any liquid.
In a small bowl, whisk together the olive oil, red wine vinegar, minced garlic, dried oregano, salt, and pepper until well combined.
Add the tomato wedges, sliced red onion, Kalamata olives, fresh dill, and parsley to the bowl with the cucumbers.
Pour the dressing over the vegetables and toss gently to coat everything evenly.
Sprinkle the crumbled feta cheese over the top and give one final gentle toss to incorporate.
Let the salad rest at room temperature for about 10 minutes to allow the flavors to meld before serving.