Let’s take this in reverse order.
NO. The court didn’t “issue a worldwide injunction against all tariffs.” To the contrary, many are still allowed. As the article says, “The ruling left in place any tariffs that Trump put in place using his Section 232 powers from the Trade Expansion Act of 1962. He put a 25% tax on most imported autos and parts, as well as on all foreign-made steel and aluminum. Those tariffs depend on a Commerce Department investigation that reveals national security risks from imported products.”
And now to address your second point about “a couple of people c[a]me whining.” It wasn’t a couple people. It was five businesses that were negatively impacted by the tariffs: V.O.S. Selections, FishUSA, Genova Pipe, MicroKits LLC, and Terry Precision Cycling. [Here’s an overview of VOS:
https://libertyjusticecenter.org/wp-content/uploads/VOS-Selections-Story.pdf]
Any party, individual, corporation, church, or state authority has the right to challenge laws they think to be unconstitutional. As it happens, the plaintiffs got widespread support:
“The legal battle against Trump’s tariffs has created unusual bedfellows, uniting states led by Democratic governors with libertarian groups – including the Liberty Justice Center – that often seek to overturn government regulation of businesses. A dozen states have filed suit against Trump’s tariffs in the New York trade court.”