It sounds like she just wasn't trying very hard. Sorry to sound harsh. The thing about bunnies is, if they're bored the WILL chew on things. So you have to give them lots of stimulation and acceptable things to chew, like blocks of wood, cardboard tubes, etc.

Re/ the litter-training, yes it does take some effort. Some seem to just take to it automatically, but some need to be told what to do. (For me, this involved literally picking up the rabbit and placing her in the box every time I caught her pooing where she shouldn't.) Eventually they catch on. They're pretty smart that way.

It's not uncommon for people to let their bunnies have the run of the house. You just have to make sure that the house is bunny-proofed i.e. all wires are inaccessible and that they are litter-trained.