Being one of the most used Pokemon in today's Metagame, it sure says a lot about it. On paper, Tyranitar seems horrible with all those Weaknesses, but with Sand Stream+a buff to its SDef, Tyranitar is no joke. I say he is definitely worth using, as Sand plays a major part in the Metagame. The standard Tyranitar usually ruins common threats like Dragonite, Landorus, Ferrothorn, and others, while having the massive bulk to take many hits. He has a wide Movepool, so it can run Movesets such as Physical, Mixed, Special, and Support just to say a few. As stated above, he is a Pseudo Legendary, having a massive 600 BST.
Here shows the Tyranitar Movesets we posted. Tyranitar is definitely a Pokemon worth using despite its flaws.