Maduro isn't a good leader. He's been very repressive, very likely stole the 2024 election from his opponent. Venezuela has terrible economic problems and food and medicine shortages.
They have been assisting Russia, operating a shadow fleet of oil tankers that routinely disable transponders to evade international sanctions against each other. They've also been helping Iran to manufacture UAVs.
They are also a narco-state. The cartel there has at least partially captured the government.
Installing a more palatable leader and administration would perhaps allow the sanctions to be lifted, oil to be sold on the global market, and aid to flow in. The brain drain from the country might partly reverse.
Or, it could devolve into a civil war, insurgency, mass refugee exodus, etc.
All the above describes many countries, more or less. Why the US is targeting Venezuela in particular likely has to do with oil, geopolitical principle (Monroe doctrine) and advantage (weaken Iran and Russia), Venezuelan immigration to the U.S., distraction from Trump's failing health, personal & political scandals, "red meat" for the base and war-hawks, and the political security afforded to a "war time" president.