Ah! once again the iniquitous tiny little itty-bitty pot for a plant that likes to be able to spread out its roots and get nice and big - like trying to fit a Mach truck engine into a mini-minor car body, really. Probably sitting in a saucer of water, thus keeping the roots constantly waterlogged. Roots all scrunched up like bent straws, making it impossible for the plants to feed. Plus the exposure to strong artificial heat and emissions from the wood stove, and leaves choked with grease from cooking, and dust, and I'll bet the poor plants don't get much sleep at night due to their required curfew being ignored. Plus the inadequate light through a glass window, which filters out certain rays from the sun which they need for survival. Plus I'll bet all the doors and windows are shut to keep out the cold air, so there's not much air circulation.
Aside from those things, I don't think you need to fix anything.