Is that a picture of your plant? If not could you show us one?

yes these are all pictures of my plant, including the one of the singular leaf

how about some words about the plant..

do you mist it..

looks a bit like sun thru water burning the leaves... is it close to a hot window..

how do you water.. how long have you had it.. how much light does it get.. when is the last time repotted... etc..

you really havent given us any of the story.. upon which we might solve the mystery ...

ken

ps: some of the injuries look mechanical.. by which we mean.. someone or something brushing up against it.. caused injury .. got kids or cats or drunken neighbors who hang out around your plant???

I don't know this plant, but it looks pretty good to me. I think it is this:

https://toptropicals.com/catalog/uid/cissus_rotundifolia.htm