We've never talked about Kotal...and WOW...I've never heard a take like that about him.
Interesting, it must have been with others then, as I've discussed this several times here on this site (and elsewhere). Kotal is a great character, and part of what I love about him so much is his human flaws and hubris. In both the comics and the games, he constantly causes his own issues as he's stepped above his station.
She legit DIDN'T have a right to the thrown as Shao had no heirs, and he didn't pass the thrown down.
In
Mortal Kombat (2011), Shao acknowledges Mileena as his true daughter and heir. In
Mortal Kombat 11, when he learns that D'Vorah killed her, he was furious. Mileena is without question his heir by his decree, as she called it.
And the Edenians only backed her in MKX after Kotals coup because they (Rain and Tanya) saw an opportunity to seize power for themselves.
Rain only, actually. In the Story Mode, Tanya actually appears to be loyal to Mileena and believes she'll grant a free Edenia.
Not to mention that Outworld had been suffering under Mileena's rule (according to Kotal and his coup).
No. We actually know very little about Mileena's rule. All we know is she ruled for about 17 years before the coup, next to nothing happened of note during said rule, and she was called the "mad emperess." She also did not like Earthrealm but didn't seem to launch new aggression against them. During all her time, Outworld seems no worse off under her than Shao. My own speculation is she simply indulged herself, and Outworld began to stagnate.
Kotal dethroned her out of concern for war with NetherRealm, believing alliance with Earthrealm, or at least a cease of hostilities, was needed to survive. She refused as she didn't trust them. She the ordered his execution (and Reptiles and D'Vorah), a fight ensued, Ermac turned on her and defeated her, and Kotal got the throne.
He then didn't aggravate Earth, but didn't make alliance to defend against the NetherRealm as he said. Several years later, in the comics, he went there seeking aid and Special Forces put him in chains. Seems even after not being aggressive, Mileena wasn't exactly wrong about not trusting them. Another example of Kotal's hubris and bad decision making.
What did Liu Kang do? He was unproven, but was chosen to go to the Shaolin Tournament to defeat Goro and Shang. He proved himself there in tournament.
What did Kung Lao do? He was passed over for Liu, and sneeked into the tournament...
Again, people dump on Jin yet give Liu and Lao a pass simply because they're established characters who's accomplishments we already know about.
For Kotal, his downfall is what it usually is: his hubris.
Again, I'm gonna re-read the Kotal portion of the comic and get back to you, but on the overall modern MK narrative, you're right, I don't have jurisdiction over it, thus I'm not campaigning to have it changed. After a decade of movie-story modes, I have grown tired of the format, which is why I want something different. That being said, I can want all I want, it means little to WB/NRS.
That's cool. Again, don't mistake me, I'm not saying the stories are Shakespeare or anything. I see them, as they're structured now, as soap operas for guys. The dialogue basically boils down to "Hey you let's fight." "Them's fighting words." I'm okay with that for what it is, as I look elsewhere for higher quality story telling, other genres. For fighting games though, this is still the best out there and I can have fun with that.