Hhmm, immediate executions by Ned Stark and John Snow.
Others who received summary execution with no trial: Beric Dunderion hung by Lanisters, and Mance Rayder burned at the stake by Stannis. Doesn’t seem that trials are a priority for the elites.
The trials conducted by the elites had preordained outcomes for people who were not guilty of the crimes they were accused of.
The people who were to be tried by the Sparrow were guilty of the crimes they were charged with.
Every example you mention is basically military commanders handing out summary executions for traitors, outlaws, or deserters during wartime. That wouldn’t be unusual even in our modern day, and it’s certainly not comparable to the type of criminal prosecutions that the High Sparrow is undertaking.
“The trials conducted by the elites had preordained outcomes for people who were not guilty of the crimes they were accused of.”
Certainly they have tried to rig trials in their favor, no doubt, but in every case, the accused still received a trial, had the opportunity to speak in their defense, call witnesses, and failing all else, appeal to trial by combat to receive a fairer outcome. The High Sparrow has systematically eliminated all of those options for his prisoners. So if you think the trials conducted by the elites were unjust, unless you say the conduct of the High Sparrow is even more unjust, you’re being hypocritical.
“The people who were to be tried by the Sparrow were guilty of the crimes they were charged with.”
So what? Guilty people don’t deserve legal protections?