My own view has always been that DT himself has not colluded, but I do believe that others, such as family members, Manafort or Cohen, have colluded to some extent - whether they knew they were dealing directly with the Russian govt or not.
However, as far as Individual #1 is concerned, I don't think they needed him to collude. I believe that they (the Russians) had identified DT a long time as having potential and they just needed to find a way to deploy his (to them) unique combination of talents and qualities - someone vain, not the brightest, lacking integrity, empathy, sensitivity, awareness of international affairs, the lives of ordinary people - and many more. They had ample opportunity to see these qualities close up and to determine that "we can use this guy". They didn't need to tell him to do much, just "be yourself", in the clear knowledge that letting someone with his unique collection of talents anywhere near the corridors of power would unleash a tsunami of trouble for the US. He didn't need to be given instructions or guidance. Just run the US like you run your businesses - the same principles and the same approach - and look at what this has yielded for Russia, in only two years.
Of course, Trump says he's been tougher on Russia than any other President (BS of course), but it suits Russian interests to lose the odd battle or have the odd setback (e.g. the Iran deal), if the long term goal of isolating America and turning it into an international pariah were achieved - and they're well on the way to doing that. Thanks to DT, America is a country with which few other countries would want to enter into agreements, as they know they'd be dishonoured or flouted. From Russia's perspective, the plan is going far better than they could possibly have wished.
And the theatre now going on and the due process that has to be followed before he is taken out must just be adding to the enjoyment that the Russians are having over this. They probably know that the game is coming close to an end and he will ultimately be removed, but the long term damage to the perception of the US around the world will remain long after this debacle has ended. Trust takes a long time to be rebuilt once lost.
A number of countries worked with Clinton, including giving her money, in the hopes that she would win. Her husband helped China enter the WTO. Even if Trump's team had a small and normal amount of interaction with Russians (as well as Canadians, Germans) then fine. If something improper happened, let's hear about that right away. I am waiting for the information about the improper activity.
The fact that Russia may have tried to influence the election is even less noteworthy. Of course, they are involved in covert efforts 24/7 since the founding of the USSR and before that. As are MANY other countries.
If they did NOT attempt to influence the 2016 election, that would be incredible news and totally unexpected. The idea that Russia may have attempted to influence the 2016 election is not a news story at all. A news story is required to have new, or surprising information. Instead it is a message that is meant to imply that Trump was not elected and the Establishment deserved to win. The voters were bad... that is the point of the story. To label it a Russia issue is misdirection, done crudely.