What is killing/killed my Monstera? :(
Hey,
I bought this plant 2 weeks ago. Monstera, indoor. There've already been 2 little black "patches" when I bought it, but I haven't thought much about that, "maybe just burnt or something" I thought. They were actually little marks.
Today, it looks like this. :( It's getting worse and worse every day, and I have no idea what do/did I do wrong. I watered it after buying, then once/twice a week considering the feeling of the soil in 2-3 cm deep in the pot. I didn't let it soak in water for hours/days. It's not directly in the sun but in front of the window. No AC, no wind in the room. I haven't repot it yet as it looks already stressed of something.
I looked for some pests, but haven't really found anything, but I'm a beginner in this planting thing. I suspect this might be the problem but idk.
Maybe I cannot save it. Just please help me, what did go wrong? Or if I can save it, how? I do everything for it now.
TYIA!
PS: Sorry for the bad English, not native.