Some YouTube videos I found on some of the New Republic topics that the OP gave as examples of NR ineptitude/poor writing:

This makes the New Republic look AWFUL - 2 min video at EcksClips : the Mindflayer scene in Mandalorian.

The New Republic is TOO NICE [Why is it So Creepy??] - 9 min video at Geetsly’s : Dr Pershing, Elia Kane and the mindflayer.

The Mandalorian season 3 set a plague unto my household - 17-28 mins into video - at Sheev Talks : NR writing & worldbuilding.

This New Republic scene explained EVERYTHING - 90 sec video at EcksClips : NR Govt not having enough resources.

The New Republic is Immediately Stupid in the Ahsoka Series - 8 min video at Eat Garbage : NR Captain lets ‘Jedi’ onboard.

This was pretty dumb writing - 1 min video at EcksClips : resources to try and recover the powerful hyperdrive?

This made the New Republic look TERRIBLE - 90 sec video at EcksClips : Ahsoka series - Senator Xiono vs Hera.

Is The Star Wars New Republic TOO Stupid? - 12 min video at New Rockstars : Ahsoka makes the NR Govt look incompetent.

Is the Mandalorian ruining the New Republic? - 7 min video at EckhartsLadder : Pershing + demilitarisation of the NR fleet.

The New Republic Problem - 16 min video at Generation Tech : setting the New Republic on a disastrous course.

Ahsoka & The Problems with the New Republic - 12 min video at Thor Skywalker : politics of the NR + issues in the shows.