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If this is your attitude then I think considerable weight has to be given to the possibility that you could be completely oblivious to whether of not you provided good service.

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I don't see how exactly you divined this. The service I gave was fine, and there's not much else that I can say.

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It was fine according to you.

Most people tip especially when there is a large check. Therefore when no tip has been left there is a much higher chance that the service was poor.

We can't know whether your service was indeed "fine". What we know is this.

There was a large check

most people tip unless they were not happy with the service

you seem to be displaying an attitude where your customers owe you a tip, as oppossed to you needing to earn a tip.