The presence of luck-based mechanics in a strategy game can be both a blessing and a massive frustration.

In the context of lane-pushing arena battlers, RNG is typically minimized compared to card games or auto-battlers.
Starting Hands and Card Rotation
If your opponent rushes the bridge and all your cheap defensive counters are at the bottom of your deck, you lose the tower.

By ensuring a healthy mix of low-cost cycle cards, they guarantee they will always have some form of defense.
Flexibility is a skill.Remove the guesswork from the mid-game.Some RNG is healthy for the game. Troop Movement Quirks
While developers strive to make AI as predictable as possible, the physics engine can occasionally create chaotic results.

Leaving a slight margin for error in your defensive placements is the best way to handle AI unpredictability.
Genre TypeRNG DependencyAuto-BattlersExtremely High - Relies entirely on shop rolls and item dropsStandard Tower RushHighly skill-dependent after the first 30 seconds The Mental Game
Getting angry at a bad starting hand only causes you to make further mistakes and lose the match entirely.

If you are stuck in a lower arena, it is because of your fundamental mechanics, not the random number generator.