Joseph,
Those that quoted Rav Shteinman as being for Nachal Chareidi were taking him out of context.
You have also taken him out of context.
In the first article you cited (assuming that the source is reliable), Rav Shteinman says that his support for Nachal Chareidi was only for OTD bachurim. While it seems that he mostly does not support N”Ch, you can’t say he opposes it completely, which your title implies.
In the second article, Rav Shteinman is quoted as saying he did not know the intention of the person asking. Therefore he gave a brush-off of an answer. That’s hardly a source to rely on.