I'm fine with Veronica Mars in space too, but even they had better pacing with respect to a seasonal arc... Pure filler episodes have zero place in an eight episode season.
As far as it being an homage to Western serials, well, nowadays that's an incredibly small niche to appeal to without updating for current audience tastes.
That's a subjective opinion masquerading as objective fact. You and others may want a show with each episode being important to the overarching narrative but I object to that being a question of
taste.
You're holding the first live action Star Wars show to the same narrative principles that should ordinarily govern a cinematic saga. But that's not always how serials work. Maybe, just maybe, this first season isn't meant to have some grand operatic plot to it. Having "the Child" be a part of this narrative and The Mando gunning his way out of the Guild is what grounds the plot in having some stakes, but seeing as this show happens in the 30 years between episode 6 and 7 there's plenty of time and room for "filler" adventures.
It comes down to unreasonable expectations that you seem to have placed on what this show was supposed to be. It seems you'd only (I can only assume) accept a "monster of the week" device in a Star Wars show if the first couple episodes hadn't laid a plot and narrative stakes, but that would be a terrible show. Maybe it's not the most compelling thing from a narrative perspective but maybe it's fine for an action/adventure show to have a limited scope.
If you don't like that, that's fine. Maybe the show isn't for you. For others, a brief live action adventure with a self contained story is satisfying television escapism. What isn't okay is you deciding what is an objective failure of narrative decision making on behalf of the entire audience.
Like I said, I and many others are more than content with the limited scope and self-contained story. What I'm not content with is being told that I am wrong in how I am being entertained.