The most honest reading of the data is that it was neither bad nor good; that it had no impact on anything whatsoever. Whether you read this as a win for the Leave or Remain factions is in the eye of the beholder.
It only seems incredibly unlikely it did nothing because we were all subjected to industrial-scale propaganda claiming the effect would be huge. In hindsight it is obvious why there was no effect: the single market is only a single market for goods, but Britain primarily exports services.
Your point on goods isn't... Good. Services is the majority but goods still make up ~1/3rd of exports, and don't forget we still have to import goods. Brexit affected that too.
truth of this unfortunately depends on the analysis of others, thus when those analyses . The data cannot itself show whether the