I thought you said you played before. I guess you didn't know what you were doing then either? ._.
Anyway, there are a few reasons. First, the corp types you have in your country are not particularly good. Clothes, Cattle Feed, Potatoes, Heavy Armored Vehicles, and Minerals are bad choices & are losing money. Bricks are OK, nothing too exciting. I do not recommend nuclear defense missiles either.
Further, your corporations do not seem to be ordering upgrades. Double check that they are doing so.
Also, I don't think you have set your supply quality. It seems to be using "any quality" which is a bullet train to Hell in this game. Average Supply Quality for state corps should be around 190 (you can get away with less depending on the market & your trade strategies), anything higher is a waste of money.
Next, your trade strategies are a mess. I'm seeing corps making 148Q product selling for 138% and buying supplies at 108%. I use quality+20%, -10%/month for selling (so 148Q should sell at 168%), and I buy at 91%, +9%/month. I don't know if they are the best settings possible, but they're better than yours. Use those or experiment a bit to get a feel for it.
Finally, you don't have many private corporations in your country. It can work to have a state-run economy if you do it correctly, but in general I prefer private corporations.
In summary, replace the bad corps, fix your supply quality, make sure you are ordering quality+effectivity upgrades, and then be patient and wait until they improve. Or, you could let CEOs build in your country. CEO corps will pay you country resources used fees right away, so you should see a quick improvement in your income.
Also, your military is costing a bit of money. Military isn't very useful in a secured country. Either buy some MIBs and go for your level awards ASAP or deactivate/sell your military.