If you go from an E to a D- you still failed
However I sincerely hope he can improve his ratings further and start governing instead of tweeting. Hate think how much worse we would be off with president Pence or Ryan.
He hasn't failed. He' president until 2021. After 8 months in the job and never having been in politics at all beforehand, I think he's getting into the swing of it. When you started a new job, how long did it take you to get up-to-speed?
In any case, he's made his military bones with bombing the Syrian air base. He's become the "emphasizer-in-chief" with his warm visits to hurricane disaster areas and meeting people who are suffering. He's learned that the establishment Republicans are full of it like he said during the nomination process, just like the Dems. So now, after wasting his time watching Republicans trying to repeal Obamacare and looking like a Chinese fire drill, he's learned that he has to cross the aisle and bring the opposition party into the fray to get legislation passed. Just like previous presidents had to do. As he does it, all the complaints from Democrats especially about "grid lock" in Washington DC, will be reversed. The public will applaud Trump for doing what Obama failed to do. Sure, people will complain that he's not getting everything he promised during the campaign. But people will respect Trump's practicality. It's better to get 80% of something than 0% of everything you would have liked to get. Deals only work when they're win-win, not win-lose. You've got to compromise.
Since the Senate especially requires 60 votes to stop filibustering, an impossible task currently, the opposing party has to be brought into the deal. Either Republican Senate leadership agrees to this or they have to do away with the filibuster rule, something that Senate Leader Mitch McConnell does not want to do. So he'll have to work with Trump to bring in Democrats and moderate Republican requirements to get legislation passed. Democrats like Pelosi and Schumer will have to work with him as well. Otherwise the public will blame them for stopping legislation and continuing gridlock.
In the end, the public with applaud Trump for getting things done. Most of his supporters will understand the process as well even though they don;t get all they expected. Soon you'll see his popularity go above 50% as independents and others in the middle join in his approval. Of course, the die-hard haters will continue to complain about his hair.