Part of the game is learning the mechanics. That's how its built. Sorry you don't like it. Eventually your going to learn to check depuff and buffs for information, as well as how look at related champion stats to see effects of buffs and debuffs. Left clicking on units pulls up their information and you can see stats, as well as what buffs and debuffs that unit is suffering from. Directly above your ability bar is where your champions buffs and debuffs are applied.
Stacking buffs and debuffs will have add number to represent the stack. Stacking ability's are worded as such. For example 
has a rare slow in game that works with stacks, this ability is an exception rather then the norm. As such is in his tool tip clearly states the ability stacks. You can see the debuff get reapplied into a 2stack state and then turn into a stun at the 3rd stack. Information on what the ability is doing is also provided in that debuff icon.
@Rylaias. You keep complaining that it doesn't function how you personally like it. Its still clearly visable as a debuff icon. Its duration is consistent. It follows the basic rules of the game. You don't approach it from a gameplay standpoint fine, you can do that, you can get annoyed at it for not obeying your logic. Yet it functions the same way every time regardless of your knowledge, expectations, or dislike for it. Slows don't function the way you though or like, bummer but you need to adjust your understanding. They function the same way in game regardless of your understanding. Gameplay matters more then it adhering to real life logic.
@ Frostfang. 12 seconds per minion killed. You get a Debuff icon when you kill minions. You can time its duration. A bit of testing shows 12 seconds per minion killed. The Debuff icon has a timer on it that shows how much longer its disabled.
@slowdowns. Abilitys and items that stack say so. Basic game mechanics however function the same way. You can see negative changes to champion by left clicking on them. Buying HP items stacks hp. Buying armor stacks. The Debuffs from different slows are all applied How ever the basic mechanic in the game for slows is that only the strongest takes effect, they don't multiply or add up. This is observable IN GAME with no necessary outside knowledge by trying to stack slows one time and seeing that it makes 0 change to the reduction in the enemy Movement speed. You left click on a champion to see their stats. Ability's that break this rule explain so in their tool tip. because they are the exception to the rule not the norm.
@Brand skills? (i assume the passive ability on him is what you want checked?) and Torment.
It reapplies Torment. Again left click on an enemy champion and this is clearly showen. If you get 3 stacks and they go BOOM? Yea that reapplies torment. Does Torment do damage properly? Yes. Item functions as expected. Very simple to test. Look at debuffs on enemy. Go into practice tool and double check it if you want. 
and 3 
gives you the same flat AP as 
.
You ask a question but have your own assumptions on it. You get the correct answers. You decide to stick to your assumptions rather then adapt to new information.
Also Elo systems can work for more then just chess despite being invented to be used for rating chess players. Literally the second sentence on Wikipedia will say this. Not expanding your own knowledge, and miring yourself into your viewpoint is only going to hurt your ability to learn. I cant discuss how MMR systems are derivative from Elo systems and what expectations we can have for that when you refuse to believe Elo systems will function for any game besides chess... because the only thing you know about it was that Arpad Elo made his system for chess and will not make any effort to grow your personal knowledge on the topic.
As i am trying to help you correct some wrong assumptions you have. Let me also point out that Moderators and Rioters have colored names on the boards. Moderators are volunteers, not employees. A Rioter arguing with you would have a lot more credibility posting as a Rioter. Red post on this thread for example. "This is our system. In this it works as intended this is not a bug." Boom, the conversation is over. There is just no realistic gains for any one to be "undercover" because it only makes it more difficult for them to influence players. Meanwhile folks like me and the other guys here, your calling us deceptive and all we are trying to do is help, that's frusturating.
there a reason your getting a lot of downvotes man, take a breath, don't get mad. It is ok to be wrong about thigns, its alright if your new and ignorant on systems. But let the people who want to help you, Actually help. don't dig in your heels and double down on your assumptions. Don't only accept things that only confirm your views and disregard everything else. Grow,I encourage you, please learn and grow.
Till then, I will be around and im happy to answer questions for you. When the correct answer is known, bummer if you disagree with it but dude expect the same response every time you re-ask that question. no matter how many times you ask some one 4+4 the only correct reply is 8. If some one says 44 they are wrong. Its simple. Its really that simple. No matter how much the insult the folks who tell them nah dude its 8. Still wrong.
You'll note I'm trying to be a lot nicer to you once you said your native language is not English and your still learning to speak English. Language barriers make things hard. Please let me know if I used any words you don't understand.
and twin ghost have sight can see just teemo R or anyone stealth champion 
