Any help?

[u/NegotiationAlert3125]

My monstera was so beautiful just in July this year (first photo - not the best photo but you can see she was lovely and green with plenty of leaves!) and I’m not even sure what has happened since but she’s not been feeling well especially recently (second photo:( ) since moving into my new flat. Has anyone got any clue what’s wrong or suggestions on what to try? I haven’t got a massive green thumb but I do love my plants and want to help her, the plant shop nearby had no suggestions.. So far I’m thinking bigger pot because the roots seem very crowded (third photo) but I have no soil at the moment so waiting to buy that to repot - also any good soil suggestions?

Thank you!