Can you explain why you feel this way?
A little less anecdotally, a cold is a viral infection, so medicine will mostly target only its symptoms, not the underlying cause. If the symptoms are bearable, then this looks like a bad idea to me - I'm inclined to think the symptoms are there for a reason.
The rest just makes you feel a little less awful. All the studies show the current OTC remedies don’t shorten illness duration (which conversely means they don’t lengthen it either).
The “evolutionary response” hypothesis is a lesser form of “smart people going with their gut instead of science” - which is partly how we’ve gotten into this mess in the first place.
Smart people seem to get important things wrong quite a lot.
Being unable to breathe through your nose serves little purpose I can think of.
Your 'most of Europe' doesn't really fit with my experience of the UK.
As a generally healthy Dane, when I get the cold or the flu I generally don't take any medications for it, and neither does most of the people I know.