Shyvana doesn't suck, she just lacks Utility/CC
A rioter says a Tank is supposed to be a champion who's Tanky and have that CC power to them.
Shyvana doesn't suck when it comes to laning but when it comes to team fights she lacks Utility/CC to actually do something. Sure she has her W but her W is within her body range and you can't get TOO close to the enemy because like what most arguements are now-a-days "Tanks get melted so easily".
Maybe if her Dragon form was Immune to CC it would be pretty damn useful as a Tank for her but then people would find that OP.
Shyvana needs some kind of stun or a different utility/CC that would make her more useful in team fights than worry about being too close to getting "melted".
Remember it's not her W alone that damages the enemy a lot, you have to land her E first but once those two skills are on cooldown you pretty much are useless.
meta. She's really not that bad. She litterly get free stats on her passive. Maybe they could make her cc-immune with the ult jump?