Tanks building wrong
EDIT: For clarity, "Priority" means you should choose these items in most games over other options. Not that you should buy them first. Most people understood that, some did not.
Before you say "You are bronze" I know. This isn't from my experience. It is general knowledge from watching high level play then watching how my ranked games go. :)
I see tanks building 400-500 armor. Then whining they die too fast and tanks are useless. So here is a tip that was shared from a high level friend.
Stat priority for tanks should be like this:
Active mitigation and shields
Try to have at least one of these, preferably two. :D Regardless of their pen, %HP damage or any other stat. Lowering their AS, crit damage, or shielding yourself cannot be overrated.
Then Health Lots of items have this. But a tank shouldn't end the game with 2900HP unless it is a really short game. :3 Doesn't matter how much armor you have if you have no HP, because armor is easy to penetrate. If the enemy Garen applies BC to you that is a 30% shred. The ADC also penetrates 45%+7% ideally. Health usually comes with Armor and MR however so no big worries.
Then Armor and Magic Resist
Try to build things that synchronize well with your champion and role. While
is good on Rammus. A better choice on Leona would be
and while that is good on Leona.
is better on Shyvana because no mana =o Also buying MR and Armor that comes WITH HP is always more bang for your buck. On most tanks
or
is better than 
Then HP Regen
It isn't as huge, but forms of HP regen are nice. You usually get this anyway from your HP/Armor/MR items though, so it isn't a huge priority. But things like
are always nice.
Only then should a tank worry about damage. I see too many tanks at my level of play with builds like this:
complain tanks are useless. None of these items are bad on their own and work well when mixed into builds with the others, but just building for this damage/tank builds with no HP, active mitigation or shields. Is the reason you die so fast. Obviously builds vary per tank. But this is just some general advice. Itemize better, tanks are fine. I play Leona, Shyvana(Not a tank but a Juggernaut), Sejuani and a couple others. :D
Good day friends.
EDIT: Tenacity is also great on certain tanks. As you are the first diving in and will absorb some CC. But it isn't as important :3
are optimal for early itemisation.
(which is a super underrated pure tank item).
picked him into a losing lane match up based off my teams comp and theirs.
having little to no cc, alot of damage, no tank no engage
enemy was

and we all know
would be a tank due to engage, cc, ect.
but discredits any validation to trundle 's ability to tank.
support
etc, he is too strong of a splitpusher, and does too much damage to squishies and other bruisers to actually be a tank. This is why he is on the juggernaut list
meaning that in that department he is rather bad (they are building straight tank which is why).
and i have played

which are tanks as well.
