[2020] Cities.exe caused an Access Violation (0xc0000005) in module Cities.exe at 0033:edfa9722.

You are running out of memory, which causes the game to crash. Looking at the fact that you already have an almost full pagefile of 30 GB, I recommend you unsubscribe workshop items until the crashes stop.

You can always make collections on Steam to save assets you like, which you aren't using, so you can find them again easily, if you start a project that needs them.