STOP!! the changes are good highschoolers
Kids dont like to read long sentences.. I will simplify it into dr seuss book amount of words.
Play AD assassins/Casters,AP tanks, ADCs, and AP/AD caster or AD assassin jungle, and/or top.
There you will have a better time. If you want me to explain more in depth for the more intelligent people well I will explain in detail why. If you like the simplified version then take that above and go
Its tough being a kid, your brain isnt close to development, most are illogical and impulsive, you care about things like going to parties getting drunk and talking to that 1 hot girl that makes your panties drop. You're heavily emotional. I get it.. but if you're frustrated and you're angry ... try to relax and think for a second this is how you regain control of your mind(not impulsive anymore) League if a mental game, no one can deny that. I've seen people 4k+ games(Wins only) and still bronze or low silver... So listen when I tell you this.. The meta has changed, Assassins in general are VIABLE now. Yi jungle was nice but in a tank meta, most people wanted tank junglers. zed was a little normal, but now ALL assassins are significantly more viable than ever before.
I think doublelift or the oddone said once 2-3 years back "Assassins are the X factor of mobas" or something similar to that.These guys cream your back line. Now they're viable again, these guys mess up the tryndameres, yasuo,s ADC's, APC's, etc... The game has shifted, it's not longer a standard bruiser top/AP mid/ tanky jungler/tanky support ADC with very little diversity. This WAS the standard, it only became diverse when you had an AD zed mid(oooh biig diversity) or every once in awhile a kha or yi jungle. (But you sacrificed the late game tankiness in the tank meta, kinda dumb for team play, ok for solo queue)
Now tanks have taken it hard. this is not season 5 anymore. Accept that there are changes. If you continue to play this Season 5 standard APC mid, bruiser/tank top, Tanky jungler... well the yasuos, tryns, AD casters, Assassins.. are going to wreck you.. yes you can still win but you need a more diverse team comp to make it consistent. Accept the changes people, stop playing like season 5 you will enjoy it more.