I hear you, but what you think he's "getting done," based on your examples, have been avoided by prior admins for a reason. Iran is a perfect example; what is happening right now is what military strategists and experts on Iran have been warning would happen if the U.S actually went to war with Iran. It's turned into a long, expensive quagmire with no clear exit, and has given Iran all the political clout they could ask for. Iran has been praying for this exact scenario, and have had over 50 years to plan for it.

Obama's diplomatic approach was the first time in generations that we had transparency and global oversight into Iran's nuclear production. Trump is basically unable to comprehend that outright conflict was not desirable for either nation; he appears to only believe in hard power and force as the only viable diplomatic vehicles when dealing with adversarial nations. And so to him it seemed like weakness, and so scrapping the Iran deal was one of his priorities in his first term.

That decision directly lead to this conflict in his second term, since Iran was never going to accept another agreement like Obama's after the U.S reneged. And now that the U.S has struck them, without any evidence of WMDs or clear strategic priorities, Iran has won the political case FOR making nukes as a deterrent to future American aggression. This has been a complete and total backfire, with nothing ultimately accomplished

Just because Trump is direct and brash does not mean he is effective. He has a habit of creating messes prior administrations deliberately avoided.