It seems a bit far-fetched to have contracted both scabies and bed bugs from the same location. There's also the not insignificant issue that scabies is predominantly spread by skin-to-skin contact. It would be very, very rare to catch it from contaminated bedding and the presence of the skin crusts containing scabies eggs and insects would be very obvious from even a casual inspection of the bedding.
Bottom line? Your tale of woe isn't credible and the only real issue appears to be your own personal hygiene and/or dubious choice of partner.
BTW, your reviews are very, very poor and your comments regarding the state of the host's accommodation and your subsequent post on this board are defamatory. I am surprised that Airbnb hasn't already deleted them. It would very just if the host elected to sue you to hell and back, but I doubt you have the assets or income to make it a worthwhile exercise. Madam, you are a disgrace.