the issue here is that he is trashing person and his company. And no explanation is good enough for his maybe 2 valid points among 237846287 baseless claims.
I could also trash pro1 because it's not my ideal phone and there isn't one any way. But I also totally get it why it is not yet there. Pulling this of in the first place is a win for everyone involved. Being 3 months late is not ideal but considering that majority of projects never see the light of the day or are late way longer than 3 months and a lot of them are less complex to build than the slider phone this is actually still very "on time".