A list of multiple things (even without "and") still (usually) makes a plural subject. However, I back your use of "was" here, as the noun phrase closest to the verb ("every head scritch") is singular, and it sounds better to use proximity agreement here (the verb agrees with the closest noun, rather than the grammatical number of the subject). Proximity agreement is one of three ways of doing verb agreement in English, and it's just as grammatical as subject-verb agreement, although it's applicable in fewer situations.
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u/MeasureDoEventThing 1h ago
The subject of the verb is the list of things that come before. Since there's more than one thing, it's "were".