Does the husband's headship mean his wife is his servant or slave?
No. The husband is the head of the wife, but that does not mean she is his servant, slave, or gopher, nor that he can lord over her. The relationship mirrors Christ and the church, where the head loves and provides for the body, so the husband lives for his wife's benefit.
Les explains that God mandated the husband as head of the wife, but that headship does not reduce her to a gopher, slave girl, or someone an authority can lord over. The very next verse equates the relationship to Christ and the church: as the Lord is to the church, so the husband is to the wife, and as the church is to the Lord, so the wife is to the husband. Since being in the body of Christ under Christ as head is not miserable—He loves us, gives His best, and came for abundant life—the husband should likewise live totally to the benefit of his wife. Wives are told to submit as unto the Lord, but the husband's role is beneficial care, not servitude.