Riot has directly threatened to ban me if I use nomenclature EXCEPT in this specific instance, so thank you for opening the door.
There is a reason I call the brackets what I call them;
Diamond Pride (The top 1%)
Platinum Adequacy
Gold Mediocrity
Silver Terror
Bronze Chaos
...
Silver has the moniker "Terror" because unlike Bronze, people have some level of mechanical skill and knowledge, but what they lack is awareness so they are like a super intelligent 12 year old; If you've ever been around children, you know the type I'm talking about. One that is too arrogant to learn or be corrected, so he makes mistakes that even the most reeeenekton child would never do because at least simple minded children will seek guidance
and if they err, they will accept their mistakes. The super intelligent 12 year old will refuse assistance and will often lack the humility to accept their own mistakes.
In this way, Silver Terror is indeed worse than Bronze Chaos where no one knows what they're doing and players run around like headless chickens. Silver Terror has this attitude far more than any other bracket and thus, in my personal opinion, there is no discernible difference between Bronze and Silver, they're both equally bad but for different reasons.... similar to the stages of grief , one must pass through these stages to eventually stop being bad.