Virtually every Unity game ever that does a non-trivial level of background simulation has considerable jank. There’s just a point where you hav wot say - look - Unity games consistently have performance issues at some point it’s legit to just call it a poorly performing platform.
The same cities skyline where traffic hasn't worked properly since day 1? It may not be as bad as some, but C:S has plenty of issues on it's own if you try to play it as an actual game and not a scenery painter, which is all its' really good for. It's always been ocean wide, pond deep.