I have a few questions about the claims you make in your post. For now I'll limit myself to only two issues, which relate to the questions you pose about this particular Tendai group.
First, on Mikkyo: yes, you're very much correct that dharani should not be distributed and that maintaining a pure transmission lineage is a matter of first-order importance. My question in response: who have you seen distributing dharani on flyers and other public materials? (It's not unusual to print dharani on practice materials for students to use, but these are hardly posted in public places as flyers.) More broadly, which group are you speaking of regarding transmission in this sense?
Second, on clergy. In Tendai-shu, we take the Bodhisattva precepts and not the Vinaya of bikkshu (monks) and bikkshuni (nuns). This is public knowledge and it's been this way since Dengyo Daishi's time. Due to the historical circumstances of the Meiji Restoration, Tendai priests have in fact been married. In the States, we generally describe ourselves not as monks but as "priests" to ensure this distinction is clear. To the point: yes, Tendai clergy are typically married and everyone knows this. What, specifically, is your problem?
Great River Tendai Sangha: a Tendai Buddhist community in Alexandria, Virginia, USA (near Washington, DC):