You lose against Shirainui because you keep using generic support cards like Wall of Disruption, Drowning Mirror force, Floodgate and Treacherous trap hole.
If you use cards that no one else uses Shirainui Grass will stop being a problem since you won't be using generic cards that this deck is good against.
Of course you mind. You use it and cant win without it.
I understand that shiranui is OK, but you need reasons not to nerf grass. Not to mention lightsworn cards start to appear in Duel Links
Like the other guy, I would say you insist on using staple backrows because you are bad at the game and/or you are a poor guy who has not got money to buy new cards to make a deck with your own personality. Express yourself through your cards and buy some new stuff.
As someone who has never used Shiranui competitively, I can honestly say, with a decent level of confidence, STOP USING BACKROW STAPLES!!! Backrow trap cards don't do jack in higher metas, other than allow your opponent to practically dance around your strategy.
I suppose staple cards are commonly used to help you save money.
Dvorak nil exist to make you rethink twice before choosing not to use your credit card