I hope some rough numbers help in understanding the issue here:
At the very least your 85 W mini fridge will be pulling something around 7 Amps, by the time that hugely oversized inverter takes its cut, it could be a 10 Amps battery drain.
Your 75 Ah battery if in great condition is good for up to 50% of its rating, unless you plan for a very short life from it.
So, in the battery's first flush of youth and starting fully charged, there could be 37.5 Ah available before we consider the solar panel; so the battery could last 4 hours with nothing else at all on, if the fridge is running 100% of the time. Therefore zero chance of getting through the night from fully charged and new.
The 200 W solar panel will give you zero output all through the night. This time of the year, even pointing at the sun and you keeping moving it around, on a shadow free pitch, you would be lucky to see over 11 hours, a yield of a third of its rating.
Say, on a good day 200 x 11/3 = 730 Wh, so about 60 Ah, so that could last the fridge alone another 6 hours.
Therefore in 10 hours from a full battery to a flat one, assuming you started off in the morning; however there are 24 hours in the day and far from every day is good and sunny all day or many pitches shadow free. Plus treating the battery like that its ability to accept a charge anywhere close to its labelled value, will be tumbling away rapidly.
The system is not adequate, you need a different fridge solution.