> code created working on a very complex implementation

I always find it amusing when people claim "a very complex implementation". Sometimes it's a hard problem, other times an easy one. Either way that's not for you to judge.

And the implementation being complex... is that a good thing? Wouldn't a simple implementation be better? It reminded me of the parable of two programmers.

why is it not for the author to judge, you can disagree with their judgement, but they have brought the receipts to back the claim