Almost....show me Manage Storage.
Attachment 51041
That's where you see how much of you storage is Other. You can see here that while my apps don't use a lot of storage, my Other cache is double my apps! I have to clear it regularly.....
Although I am beginning to think this is largely a RAM/bandwidth issue, since so much of it is long time players who have massive inventories. As your device tries to load, the more massive your game is in terms of data trying to load on the bandwidth available, the more of your processor power it uses. So the more apps you have open, the more processor power lost to those apps. So you have less processor available to load the game.
The more other open apps are sucking on your bandwidth (notably Location Services!) the less bandwidth available to load the (massive due to massive inventory) game, and the game will time out before it loads. I also set Mail to only send/ask to Manual; otherwise, like Location Services, your Mail will constantly be pinging your device. Any app open, even a browser, will ping your device constantly, sucking your processor power & bandwidth. Location Services apps ping almost constantly, which is why I recommend disabling them, unless you are using them. It only takes a few swipes to turn on Location Services in your browser to Google "restaurants near me" instead of leaving it on 24/7. Same for Google Maps & Apple Maps.....I don't want the constant drain on my processor & bandwidth with them pinging all day & night. (Plus it will save on Data use when not hooked up to WiFi)
I will bet real $ a lot of this is also due to excess game inventory. I went into my Dragon Story(which I have been playing longer than CS, and pretty much quit due to near constant resets) and deleted a bunch of inventory, and THAT game is working better. So maybe next time you can get into this game, consider deleting buildings/decos that you don't want anymore (if possible). S8 really really needs to figure out a way for us to delete old useless event items!
I also have trouble logging on during peak internet use in my region. Hence my suspicion that there are several factors involved in the inability to log in: RAM, bandwidth, and device storage.