It's super awesome of you to take the time to provide detailed feedback for a random stranger's project - good on ya!
A single suggestion:
Try using "the critique sandwich" when commenting on people's hard work - can help them appreciate the effort you've put in rather than feeling too defensive
Based on my comment's negative score it would seem you're not alone.
I agree the feedback was thoughtful (as acknowledged in my reply) and read no ill-will in it and meant none myself
At risk of flogging a dead horse, it can be nerve wrecking to share things (or raise your first real PR, whatever) so I try to respond with that in mind - especially since text-only comms can come off as harsher than intended.
A single suggestion:
Try using "the critique sandwich" when commenting on people's hard work - can help them appreciate the effort you've put in rather than feeling too defensive