@ysmina-- I'm surprised that it was raw too. Calamari salad recipes I've seen usually call for the squid to be boiled for a few minutes first and then marinated. This is usually enough for the squid to be tender and pick up the flavors in the salad.
My mom makes a very nice calamari salad this way that's also very easy. She adds a lot of garlic, lemon juice and olive oil. She also adds seasoning and tosses everything with fresh greens. It's quite delicious and extremely healthy. I was never fond of squid until I tried this salad.