https://twitter.com/f2pool_wangchun/status/852372824643600384
why does he think that segwit will be a disaster? i did not find an answer in the linked tweets.
a lot of weird thing has been coming out of f2pool_wangchun these days (and probably before but i have not been aware of it) and he doesn't seem to be all serious about the tweets he makes and it is very possible that he is doing it as a manipulation of the prices since it has been effective on litecoin also.
so in short i wouldn't read to much into "why he says what he says"
We have to satisfy with current nodesa/algorithm of blockchain without an upgrade.
Besides, segwit or bitcoin unlimited seems too far away to become reality, or maybe impossible.