It seems clear to me, not a lawyer, that your landlord is negligent and therefore resposible for the damages.
But I am sure that you will have to sue him for the cost of his negligence and for the security deposit.
Take lots of pictures of the ruined things to support your claims.
Small claims is easy...and fairly satisfying too. Make sure you get your state laws. Here is a bit of it:
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And if the landlord fails...
to deposit the security deposit into a bank account;
to return the security deposit (or balance after lawful deductions) with interest within 30 days after termination of tenancy; or
to transfer the security deposit or last month’s rent to the new landlord;
... you are entitled to the immediate return of your security deposit AND triple damages, plus court costs, and reasonable attorney’s fees. You also are entitled to triple damages, court costs, and reasonable attorney’s fees if the landlord fails to pay interest on the last month’s rent within 30 days after termination of tenancy.
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The hardest part of filing small claims can be affixing a dollar value on what is owed to you. Be reasonable on the value of furnacings lost. If you purchased them new, then they should have almost the value you paid, otherwise you can assign thrift store value to them.
He can be liable for punative damages due to neglect of the repairs....not sure about this.
You were forced to move because the apartment was uninhabitable, he is probibly resposible for moving expenses (but not deposit to new landlord).
if you must sue for deposit...be sure to sue of the additional amounts owed should he have violated the laws of the state.