system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did the Emperor and Vader tolerate the ineffectiveness of the Stormtroopers?

Why did the Emperor and Vader tolerate the ineffectiveness of the Stormtroopers? Vader was shown to force choke those under him not meeting his expectations, why did the Stormtroopers remain somewhat ineffective during battle after battle without intervention?
gpt
Storm Troopers were actually not usually ineffective. They were the elite fighting force of the empire, more skilled than the average imperial soldier (as depicted in Solo). In general, we see them as fairly effective, from storming the Tantine IV in a New Hope, to successful invasion of Hoth in Empire Strikes Back. What is interesting is to look at that times they were ineffective, and see what went wrong.

I: The hunt for the droids on Tatooine. Here, the explanation is pretty clear. The rural garrison on Tatooine is really not trained for much besides keeping the planet under Imperial rule. They were good at brute shows of force (massacring Luke's family and the Jawas), but weren't really good at investigating and finding people, because that's not their job.

II: The death star. First, they were caught by surprise. The death star was not a combat assignment, it's more like staffing a base. Nobody imagined that anyone could even get loose in the death star, and so no one was prepared for it (maybe it's another drill). Second, by the time they were alert and prepared, they were instructed to let the heroes go, so they could be traced back to the rebel base.

III: Endor. This is were Lucas' fuzzy Vietcong analogy is relevant. The stormtroopers were on a "uncivilized" planet, where the natives didn't even have laser weaponry or space travel. They were in no way prepared to be brutally massacred by spears and stones, just as modern, developed military's forces fail miserably when faced with a surprise attack from insurgents. Lucas was referencing Vietnam here directly- the Empire's forces being the US.

Tl;dr: Stormtroopers are generally effective, the times where they messed up were situations they weren't trained for.