You've listed a whole bunch of things that are up to congress and the senate to control, besides the point that Obama inherited a deficit of $1.4 Trillion, which is going to add over a trillion dollars a year to the debt. A president can't just wipe out the spending left by the previous administration. The Bush administration were masters of contracts and spending programs that extend as many as 25 years beyond their terms by contract. Ethanol programs that benefit oil and farming interests aren't going away because billions are spent on the infrastructure started. There are federal water subsidy giveaways that impact states for decades. No matter how stupid or ill conceived a giveaway is states are stuck with them way beyond the term of the presidents that put them in place.

Trump (the GOP) passed or rather jammed ill conceived tax cuts through that impact the economy well past Trump's first term. His tariff and trade policies have disrupted trade in ways that will never be completely fixed.

People on the right seem to forget that Obama reduced the Bush $1.4 Trillion deficit by 2/3rds, any more would have hurt the economy.They also forget that Obama passed infrastructure spending bills that put at least a million people to work. They also conveniently forget that the GOP as a mission objective refused to cooperate with any program that would make Obama and the economy look good, they put hurting Obama ahead of helping the country and doing what was right. It was the party of obstruction and McConnell is still doing it.