I would like to know in full detail which perks are useless/bugged? and yes i know that there is another thread/topic posted on the forums about this but it didn't have details it just said these perks are useless and i would like to know why they are useless/bugged?

I personally think that Tower of Strength, Fists of Steel, and Cushioned are all useless. Tower of Strength because the only real time you will get staggered is if someone shield-bashes you or one of those accursed Draugr use Unrelenting Force on you. Fists of Steel and Cushioned are also similarly situational.

These are a couple useful bugs that I know of.

Deep Wounds (2h sword perk): The second rank increases *all* critical damage by 25%, not just two-handed swords. Not that critical damage is useful in vanilla Skyrim, but it's something.

Aspect of Terror (illusion): Fire spells that can be affected by the Intense Flames (destruction) perk are affected by Aspect of Terror, and gain +10 to their base (before multipliers) magnitude. This, for example, raises the simple Flames spell from 8 base dps to 18, making it rather good.

Critical Shot (archery): http://www.gamesas.com/topic/1430045-crossbow-and-bow-questions/#entry21949812 This perk also affects what you are able to stagger with your crossbow.

Any lockpicking perk is useless as you can actually pick a master lock at level one.