Hi Joe ! , i understand your frustration. Personally i think you often make solid arguments and come up with interesting questions. At least in the conversations we had you never argumented in an insulting way. Personally, i take you seriously.
What i think is happening based on what i have seen is that sometimes the arguments you get into don`t come in an appropiate timing or context. For example, in a topic about "X" topic, when people are searching info about "X" topic, you go to "tangent XY", but after that the conversation goes deeper into "Y" which is completely unrelated to topic "X".
Some tangents can be related with the topic at hand, but the tangent of a tangent gets further from the original topic.
Sometimes those conversations can be interesting to explore, but in the ocassions things go off topic, i may recommend to create a new topic to elaborate on these points.
So.... in few words, i think is more a timing issue.