Though Trump without doubt was poison to US foreign intelligence and affairs (as well as being a domestic virus), your first bit. "If Trump was now in office, Russia would be in Finland and most likely, a bunch of other countries formerly in the USSR" is likely an improbable stretch. Even though Putin's war in Ukraine would have been more successful i don't think Putin would have moved into other countries by now.
On the Steele dossier and Fusion GPS. Don't forget the dossier was always only "raw intelligence." Some of it was discredited, more never verified, but Steele himself, the dossier and Fusion GPS were never, except by Trump people, i recall, rubbished as much as apparently you feel they deserve to be. It was all simply legal and ordinary business as usual. One from 2017 ..
Back to Trump today. His exposure, and possible exposure of so many Western spies, to my mind, has to be among his most treasonous crimes:
What if Trump's conspiracy was way bigger than we know? [...] On July 31, Trump had another private conversation with Putin. The White House told Congress and the press that they discussed “wildfires” and “trade between the nations.” No droids in this car… The following week, on August 2nd, The Daily Beast’s Betsy Swan reported .. https://www.thedailybeast.com/white-house-asks-for-list-of-top-intel-officials-amid-intelligence-shakeup .. that Trump had just asked the Office of the Director of National Intelligence for a list of all its employees (including all our “spies”) who had worked there more than 90 days, and the request had intelligence officials experiencing “disquiet.” Within a year, The New York Times ran a story .. https://www.nytimes.com/2021/10/05/us/politics/cia-informants-killed-captured.html .. with the headline: “Captured, Killed or Compromised: C.I.A. Admits to Losing Dozens of Informants.” The CIA then alerted spies around the world that their identities had probably been compromised, apparently by Donald Trump himself. https://investorshub.advfn.com/boards/read_msg.aspx?message_id=169830475
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”