Crit vs Norm

So it's been bugging me for awhile now but... is there a reason that I missed as to why critical strikes on all champions except for yasuo, vayne, tryndamere, and gangplank, are absolutely worthless? I've noticed that you have to run a pure Critical damage rune page to hit decently hard enough to be able to use critical strikes at all. And even then it's hardly effective, and this is even against custom bots.

For example I used to be able to build Jax with Infinity Edge, 2x Phantom Dancers, Hextech Gunblade, Boots, (Situational Item) with a rune page of Marks: Armor Penetration, Seals: Attack Speed, Glyphs: Magic Resist, and Quintessence: Movement Speed.

And aside from life steal not giving much of anything anymore I used to see criticals that actually did damage to a target even if they went tank, a tank would just be another 2 hits ish from normal builds.

I guess what I'm asking is that I would like to know why critical strike has been nerfed hard enough to the point where building just pure damage out weighs a critical strike Attack speed build. Because if you plan it out attacks per second with an attack speed critical chance build would far outweigh the damage that a pure damage build without as much attack speed would deal, since it's a critical that deal 250% instead of the normal 100%. (This is also with the Critical Damage runes bonus 46% damage so 296% Critical Damage)

In my opinion if you build a critical strike build on a champ REGARDLESS of what champ it is, the damage should follow the power that it should hit with instead of falling off.

If I can may I request a rework on the way the Critical Strikes and Critical Chance ratios work? Or Nudge Nudge Wink Wink bring back dodge or at least a season 1 game mode where dodge still exists. Along with all the old items and settings and all that jazz? I know a few too many people that never got the chance to play in Season 1 and to be frank season 1 was the most fun out of all my league gaming years. Once they heard that I liked Season 1 the best they wanted to play it more than the way League is now. So please ... Some Consideration to the masses... not just the professional Minority.

If by the end of this novel you guys decide that I'm just whining, please at least do a rework overhaul on the Critical System at least. It's not effective enough to be of any use unless the champion pretty much directly derives off Criticals.