Look up your name under op gg. Go to ETC tab look up CS per minute. I am willing to accept that OPGG has not updated to the new jungle to cs system well, but if you want me to take your word I need a screen cap of your death or a replay clip. Its not difficult for you to provide this. I'm literally going off OP.GG for every statement you make, you can instantly correct anything I'm wrong about with proof using a screen cap. I will never be upset or angry that some one proves me wrong because I want accuracy, I want to help, I like seeing what causes problems for player, Please help me out with this if you can.
As an assassin main, Your impact is gonna be off working off teammates, folks who fuck up and overstay, and once you have items your gonna fuck up squishys solo and they can only ever rely on teammates to keep them relevant. Please remember that You yourself admitted in this very thread shaco is in a sub par place. Its ok to keep playing him, and hey if your strong enough mechanically its great to see you beat out "meta" picks... and you are over 50% win rate so your undeniably doing that so kudos. I don't hate that you one trick, just that you don't seem open to the fact balance for what feels good on shaco is not equivalent to balance for the game.
For an assassin to be able to murder 100% to 0 it requires items and/or for the targets team to not actively disrupt your burst pattern. On shaco whos abilitys require excessive time and setup or a gross item lead.... well when a decent player on a tank/support/bruiser can prevent this... his viability tanks. Feast or famine... its a very accurate for him, and the worst thing is even if he is fat and feasting if you don't have enough help and support from teammates its excessively difficult to carry your team to a win. You might be the best preforming player in that game but if a majority of your opponents are doing better then your teammates odds are you will see that match as a loss. Its not the game blance its an inherent issue with champions who have exclusively opportunistic playstyles.
I dont want this to get twisted out of context because Assassins can make or break a game.... but synergy with allies will provide consistently a higher impact on if you win the match. Assassins need a window to take advantage of enemy's misplays or allies setup. you don't get that its a fucking struggle to keep your team in the match. The level required for you to play is way way above other roles. Assassins have been considered the best class for personal skill expression in lol and its accurate because they require much higher skill then other classes to thrive. Not a flaw, just a clear cut self evident pattern of play for a class that needs to win 1v1 or outplay teamfights. If you need to do better the everbody on the other team just to be viable it means you lose out when you cant. Don't like this, reconsider playing assassins. Love your skill expression and games being decided because your the one making the right moves... assassins the right class for ya.
I really would love to see you take a break from shaco and play tanks and bruisers for a month. I think you will learn some of the moments they exhibit their best power, as well as what counters them, and hopefully it will translate into you having less issues vs them in future games as shaco.