That Putin is somehow Trump's master is an extraordinary view.
Extraordinary how? If you mean the claim trump has served Putin since before the election is extraordinary, that's completely wrong. If you mean that the clear fact that our president is serving Putin is an extraordinary situation, yes, it is. We don't know why yet exactly, but there's a decent chance after trump is out of office, Putin will release dirt on him to embarrass the US and further erode our confidence in our democracy. We'll see. Investigations might find more also.
It does appear clear that Putin helped trump financially, laundering money to him, in a way that fits a pattern of Russian grooming of assets.
But the specifics, the whole list of aid, any agreements made, are not known, and some details might never be known unless Putin releases them.
We also don't know the role trump wanting future business in Russia might play; he had planned his largest property in Moscow and presumably that could still happen. But we have seen trump constantly praise Putin, fight for Putin's agenda, fight all sanctions on Putin, and side with Putin over US Intelligence agencies and the national interest, and against our allies.
Denying Russian interference in elections, not condemning Russian assassinations such as in England, not condemning Russia's invasion of Crimea and war on Ukraine, denying Putin's bounties on US troops, betraying the Kurds to withdraw our protections and leave them to slaughter by Syria increasing Putin's power, on and on.