The evidence is certainly there.  Just because the line is not there, doesn't mean the dots can't be connected.  But you choose not to see it, due to your selective bias.  If you want actual legitimate proof, you can see in a Guardian article that a FISA article was requested to spy on Trump.  

And there has been absolutely no evidence on Russian collusion with Trump.  Even on the very slight chance that is proof, which even James Clapper said ther wasnt the intelligence community are so vehemently against the POTUS that there is no doubt in my mind if the 'so called' proof was there, than someone wouldve leaked it already.

And why is that hilarious?  Snowden leaked the power of the shadow, unelected, unaccountable, faceless deep state to the public.  These officials in the intelligence community, leaked documents, anonymously, to a media figure, without putting it in the public spotlight for us to deem as to whether what Flynn did was wrong.  Yes, there is a line to be drawn