Iranians or AOR fans taking pot shots against Houthi's is not because they underestimate them but rather their related to their expectations of how Houthi's should act while Iran is under attack.
Hezbollah under Nasrallah didn't have any surprises and I've warned for many years that he's not a good leader for Hezbollah and 2006 success was due to Imad Mugiyheh and other Hezbollah military leadership. Naim Qassam put them back in their grassroots direction but South Lebanon is largely destroyed like Gaza. Hamas and Hezbollah don't have more surprises. Being able to fight isn't a surprise but you need to understand the cost to do so at this point has no gain for them or their people.
Iran has had plans to enricle Saudi Arabia this isn't a surprise if you've watched how things have transpired from 1979 onward. I'm personally not surprised by this and have also been warning Saudis for a long time. The question is what is the end game? Can you or anyone else answer that?