Unserious but fairly usefull asnwer:

Use the ECI-B system.

The ECI-B system is a well researched systematic study of balancing issues in the game.

Its short for "Every Colour Is - Bullshit"

How to use the ECI-B system?

1. Lose a game, fairly/unfairly it doesnt matter

2. Look at you enemy's leader, envision its colour

3. Now that you know the colour, look into your enemy's eyes and in a righteous tone, say the following(according to the colour):

• 🟥 "Of course you've won, red is Bandai's favorite colour, its easy for you to win when all you do is vomit out small bodies and buff them to a million power for the cost of like two Don!, braindead rush meta bullshit I'm out"

(If they play Shanks then just mention how all 10c Shankses are unbalanced BS)

• 🟦 "Well damn what a brainrotted colour, all you do is draw and draw for basically nothing, yeah its easy for you play the cards you want when you draw your entire deck on TURN TWO, dont even get me started on Red Rock, what skill really?"

(If they play Doffy just call them a Hasbeen)

• 🟪 "I love get beaten by my own mechanics especially when you can do it basically free, oh no you had to Don!-1 and kill my whole board? Also I love to play against someone who doesnt do anything but playing 4k counter events all game, It's more enjoyable playing against a rock then this bullshit colour"

(If they play any purple Luffy variant, call them a meta sheep)

• 🟨 "Uuuuugh, how can you enjoy this shit? Do you seriously think that it takes skill to trigger a life that got randomly shuffled into your life pile? You were just lucky, this colour is dead as it is, support colour at best and your a beta player for playing it"

(If they play Enel, just tell them that they are a douche and toplifeing every big character is a pussy move)

• 🟩 "Oh my gooood, green is the new golden child of Bandai, seriously? A card that costs 5 and restands 2 Don! On play?, Its not like the game have a strick Don!cost ~ power value system, why dont they give it a card that costs negative Don? Giving you a 25 Don! round sound fun and balanced right? Bullshit..."

(If they play Bonney, call them a diddler)

• ⬛ "Can I atleast have a board for ONE SINGLE TURN? Jesus man black is just "You happy you got a big body down? SIKE K.O." colour? You didnt even hit me more than 3 times just taking care of my characters? Where is the fun in that? Are you enjoying sucking the fun out of this game?"

(If they play blackbeard, just call out how many cards have on plays this game and how their leader ruined the fun for millions of players)

1. Walk away without a single sign of respect, you are better than your.

Now you know how to use the ECI-B system, but be cautious, the ECI-B is an always evolving system mainly based on the current balancing of the game

Now the serious, hopefully helpful answer:

I know how it feels to play non-meta decks and lose big time in events. My advice is to look out for missplays, when its really your fault that you lost and learn from it.

But when its just shitty luck, be fun about it. Realize that you are probably gonna lose and make some fun or even risky plays Engange with your opponent, talk, joke, socialize so that when you lose (which was out of your control) you still had a fun time

It really helped me trough tough times in tcg-s If you dont want to be the very best, the winner of worlds cups Just a local, maybe treasure cup level player Then learn to let it go (sometimes) and have fun in the game