@Lauren259 Just leave an honest review, no need to go into excruciating detail, but covering the transgressions in a concise and simple way. Leaving a shaving mess in the bathroom, though, is just part and parcel of what hosts have to deal with- there are some super clean guests and some really messy ones. You have to thoroughly clean the bathroom, anyway, so what does it really matter?
If a guest treated your place disrespectfully, I think that needs to be clear to other hosts, it's not necessary for them to trash the place, demand refunds, etc for them to be unwelcome guests. But if the only issues were filling the trash with their camping garbage and leaving the bathroom dirty, I'd give appropriate stars (i.e. low for cleanliness), a simple review that other hosts can read beteen the lines of, and not give it another thought.