There are many people who apply one or two months before. Second there are many people who are getting offer letter later. Either they are taking their luck and applying like you or they are defering their admission. You are applying to a foreign country. They owe you absolutely nothing when you don't follow their guidelines. I already got my admission for sept 2019 and I will be filing my visa after I wait for another offer letter.
It's not the visa office's fault that your offer letter came late. It's not their fault that you filed your visa despite them telling you that you will probably not get it in time.
You are putting your foot in a bear trap and then shouting all abuses at everyone when you are now stuck.
There is no faster processing and there has never been faster processing for visa's based on the date of your college start date.