This is why I just ride with a muddy arse. No guards at the back means the tyre can spray the mud away, half up my back but I don’t care so long as it’s not in my face.
Flappy guards by the seatpost just bend and break off. Small ones to protect the shock are no point to me as I don’t have a stupid frame that puts the shock in the mud zone 😉 . Likewise front mech, I don’t have one.
Mudhugger I kind of was interested in because it attaches to the seatstay so no flappy rubbish, but makes perfect sense that it will just gather the mud inside it clogging up and/or deflect the mud down into the rear mech and brakes.