What's the point of building tank when there is so much anti-tank...

A list of all the items that either reduce a tank's armor or magic resistance, or shred hp, or stop what few champs have in combat regen from regening, oh yea, you saw it redemption 10% max hp true damage... I couldn't leave that one out.
Then there is Fiora passive/ultimate, vayne w, Garen e & ulti, lee sin q and sort of ulti, amumu w, brand passive, mundo cleaver, elise neruotoxin and venemous bite, evelyns ulti, jayce e, kogmaw's w, malz ulti, morde ulti, nasus e & r, popp q varus passive veigar's missing hp, warwicks q, jarvan passive, riven windslash, vi denting blows, volibear freansy, xin zhao's crecent sweep, morganna pool, maokai w, zed passive, shyvanna e, trundle r.
The worst part is that I'm pretty sure I missed a bunch of things that reduce a tanks efficiency to be able to do what they should.
To top all of that off, take a look at slot efficiency of tank items vs other classes. All tank items are cheaper, so full build to full build, you are already less gold effective.
It feels punishing to play anything other than burst right now. Then any time a tank is actually strong, instead of nerfing the damage the tank deals, they nerf the ability to stay alive...
pull that bitch out of there. Your job is to defend your team from enemy engage and to engage. It might feel like thanks are weak In a duel, which they might be(unless you're poppy) but that won't matter when your steam rolling through the enemy team CC'ing everyone for your team to wipe out. A team needs a tank, two is optimal, for a sound front line.
Play a team as 5 squishies and you'll see why a tank is important.