We definitely like and evangelize micro.blog in the indieweb community, but you’re right that it’s not perfect. We’ve documented the incomplete webmention support (https://indieweb.org/web_hosting#Custom_domain_silos) and they’ve agreed and said they plan to improve and fix it (https://www.manton.org/2018/10/09/webmention-improvements-on.html, https://github.com/microdotblog/issues/issues/75#issuecomment-459856232). Manton talks with us regularly, he plans to get standards like webmention fully implemented, and he’s been honest about where the holes are and his plans to fill them in.
Many of us have met and talked with him in person, and we believe that he’s sincere and authentic about wanting micro.blog to be a fully compatible, good indieweb citizen. We also desperately need fully hosted indieweb options like micro.blog as accessible hosting options for less technical people, and we haven’t have any others since hosted Known disappeared. We should definitely keep working with him and micro.blog as long as they’re willing!
Call me paranoid, but when things don’t make sense, I start to suspect malice.
I get where you’re coming from, but I’m not convinced as a general rule. Personally, I prefer “Never attribute to malice what can be adequately explained by stupidity.” …or in this case, just limited bandwidth and priorities.