Yeah, I main mid and I absolutely loathe this meta.
It is nothing but extremely overpowered, overloaded, assassins that require zero effort to click three buttons, delete you, delete the JG, roam to bot lane with more speed than you could (after wave clearing faster than wave clear mages can), with zero mana and lots of healing so they make it there fresh, and then deleting bot lane.
Your choices?
Play a handful of champions that can counter assassins, hope they do not play one of the assassins that counter those picks (Talon, Zed and Katarina can win most matchups no matter what nowadays), and also manages to roam better so when you ping your other lanes and they ignore your ping they feed them.
Oh... and you used to outscale them.... Haha
No... not any more. They buffed assassins scaling (especially Zed) and /increased/ their ability to stop you from having counterplay... because that was what we needed in mid lane.