There is only one degree of dead, and it's a permanent thing. That the decline began after the repot (did you actually repot, or did you pot up?) might be a hint. If the plant was getting too much water before the work, the added soil that is not colonized by roots would exacerbate the problem. When you can't identify the problem, you should consider making sure you have the basics covered. That your plant IS in decline is indicative the plant is being asked to tolerate conditions it's not programmed to tolerate - that's a given. You need to make sure you're watering effectively and in a timely manner. IOW, you should be sure the entire soil mass is being moistened when you water, that you're flushing the soil when you water, and you're not watering until the plant needs it. Are you monitoring soil moisture levels or guessing when it's time to water? You should also flush the soil thoroughly the next time it needs water. Do this by slowly pouring a volume of room temp water through the soil = to at least 10x the volume of the pot. This is like hitting the fertilizer 'reset' button. After flushing the soil, you can fertilize with an appropriate fertilizer. My goal would be to help the plant increase it's vitality to the point it will tolerate a full repot; then, I would repot it into a soil that allows you to water appropriately. In more than 90% of the cases we see here, poor root health is the underlying cause, so that's where I'd look for the solution. Too, there's nothing stopping you from lifting the plant from the pot so you can evaluate the condition/health of the root system. Al

It really needs a lot more light than you're giving it. Right up in front of a south facing window would be preferable. What type of soil is it in? How large is the pot? Does the pot have a drain hole? How often do you water? What do you use to tell it's time to water? How often do you fertilize? And with what?

Jordan, you'll have a better response on the House plant forum.

Okay two major problems I'm seeing: Brown spots on leaves that fell off look to be due to overwatering, a lack of air in the soil and/or salt buildup. The reddish spots underneath your leaves are called oedema and can be caused by a number of factors, most often by excessive water retention in the soil (which I think is mostly your problem). Additionally, Fiddles don't really like to be moved, so while giving them optimal light is great, changing their living conditions so frequently can cause them to drop leaves like this. If you can move it outside for the summer, they tend to thrive. Some people even keep them in full southern sun and they love it. Even if you end up burning the leaves and they fall off, they will bud right back out with leaves that are suited to that amount of sun. I put mine right into morning sun today and kind of expect to lose some leaves to this but they'll bud right back out. If I've learned anything from all my research and time with my plant it's this: they are pretty hardy and will bounce back. I don't think you'll lose the plant if correct your watering issue! Here's a link to a post with the holy grail of information about every problem you think you could possibly have. There are several posts about the spots your seeing on your leaves and a guy named Al has some awesome advice I would recommend reading! The post is huge but I would suggest just scrolling down looking for pictures of whatever problem you're experiencing and read responses (that's what I did and I learned A LOT! [https://www.houzz.com/discussions/pruning-ficus-lyrata-fiddle-leaf-fig-dsvw-vd~1458685[(https://www.houzz.com/discussions/pruning-ficus-lyrata-fiddle-leaf-fig-dsvw-vd~1458685)