AITAH?

Had our pac pinewood derby race and my kid took 1st overall, beat the next best car by three car lengths. One of the leaders came up to me and said hey nice car that you built there kinda snarky implying that I may have helped too much. I’m not sure what to think of it, I definitely did not let my 8 year old use power tools so I cut the block in the shape we talked about and drilled the holes for weight but my kid did 100% of the assembly sanding and painting aside from a clear coat I addd at the end because I did not want them using spray paint. I sat my kid down and discussed the design and did give her my opinion on what would make the fastest car and that’s what she said she wanted. Did I overstep?