Why are some people in the Japanese self learning community so down on Heisig?

The primary reason behind the huge amounts of drama in language acquisition communities in general is that they are hugely populated by shut-ins, outcasts, emotionally fragile types, and people just going through a hard time in life. When I dig deeper than "tips and tools" posts what I usually find is people looking for a way to stay busy to detract from dealing with the real causes of sadness in their lives. When your L2 progress is all you have to hang on to, a challenge to your methods can feel extremely personal. 

I'm speaking from experience here, my first couple of years of L2 acquisition started when a 5 year LTR blew up and  a during a full year of unemployment. Feeling like I was progressing through RTK gave me a feeling of order and progress when my life had objectively turned to complete utter shit. Go to the gym in the morning, go the library and do my Anki reps, half-assedly "look for a job", sit alone in my apartment watching L2 dramas- this was my life for an entire year. Eventually I had to admit to myself I was just staying busy and didn't even really give a shit about Japanese, and finally I broke out of the rut and now it's like looking back on someone else's life, it's hard to believe it was me. Back then any method I was using was objectively right and those I rejected were garbage and everyone needed to know it.

Now when I see posts screaming about how "method X is crap" I just see "my life is crap right now." Lashing out keeps us busy so we don't lash ourselves.