"If you do not compete, you fail."

Translation: Nếu bạn không cạnh tranh, bạn thất bại.

[krikori]

Is it wrong to include "thì" in any first conditional?

Nếu bạn không cạnh tranh, thì bạn thất bại.

[Huy_Ngo]

No, but usually people would drop the comma between two clauses when there is "thì".