The key card is present but its support is thin.
Prioritize useful support such as Dynamite Diver or Gilded Ghoda.
Have Cloudspire Coordinator survive a turn, then play a Mount or Vehicle and activate it for Pilots. Use those bodies to crew, while Cloudspire Skycycle puts counters on existing attackers.
Your deck enables the plan but is losing the early turns.
Take a castable early creature or efficient answer before another expensive payoff.
Burner Rocket cannot crew itself in time to target itself with its entry trigger. Target an existing creature, and keep enough pilots instead of filling every slot with Vehicles.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.