It has been very healthy and was growing like crazy, but there was unusual cold, rainy weather in the last weeks.
Also, there have been a lot of slugs on it.

I think it has caught a fungus infection, and it looks worse and worse from day to day.
Every leaf I touch crumbles, and there is pretty much no non-affected one.

Fruit development has been stagnating and there are pretty much no new leaves or blossoms too.

Should I throw it away? Or will it recover?