Can you sue a landlord if they prohibit you from using the entire unit that you rent?

Question Details: The previous tenant to the unit I rent, left dog feces all over the deck. I moved in and as the snow melted it uncovered. I left my property mgmt. landlord know and it took over 45 days for him to get it clean. I had to go to his manager to get it cleaned. I would have had it cleaned myself but I have a military allotment and it would have taken months to switch the direct withdrawal amount of the rent and then switch it back. I have asked for 1/10th the amount of rent for 45 days which they refuse to pay. Can I sue in small claims for that and is the amount reasonable?

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