Wagyu Striploin

This piece of steak cost us a bomb... Some times back, I bought a wagyu beef trimmings and I simply stir fried it with salt and pepper. It tasted heavenly. The marble of fat was evenly distributed. It just melt in the mouth. So this time I bought more and picked a better one. Surely we had very high expectation especially because this piece cost more. It turns out having lots of tendon in the meat and it's tough, although the meat taste great but I am really disappointed ;(