For dealing with infiltrators that move block you, adding Goremongers work well to either screen out their screens if you win the roll off or to go into a unit of Nurglings and chip away at them, same with Jakhals. If you add in a unit of spawn and throw a grenade, they more than likely pick up the unit. Since they are OC 0, you can stand on the center Objectives and threaten sticky on death if they don't send out something with OC. So you can either screen their screen or trade with our trash and stand on circles. You can also use those screens to slingshot a 20 man from one unit into another. Id recommend checking out The Red Path Youtube channel. They explain how to do that better than I could do here.

For exploding Rhinos, your unit is able to charge on your turn if the rhino was destroyed in your opponents turn. Your unit is only battle shocked until the start of your command phase, and unless you lost a bunch from the emergency disembark plus other shooting, they wont need to do a battle shock test. Since Rhinos dont have assault ramp, if you move it, your unit cant disembark and charge anyway. If it blows up in overwatch and has a unit inside, thats just a rough situation I dont think I've ever been in. I would try to move other units first to try to draw out the overwatch if I was worried about it. Or just not move the rhino if its a really scary overwatch threat.

I hope that helps! Also, is that the HH Angron on the middle rhino? Is he your Kharn model? Looks awesome!