It's not exactly the dark side of the Force, but I was seduced by another platform.

On the other platform, there are fewer native English speakers, usually never-making-corrections-but-only-writing guyusers, those who speak arrogant and rude Japanese, someone who writes weird, maybe-philosophical, never-understandable-and-impossible-to-correct entries, and someone politically too correct.

That's... a lot of negative users xD
Let me guess - are you talking about the platform that replaced Lang-8? xD

It's no wasn't the dark side of the Force, but I was seduced by another platform.

On the other platform, there are fewer native English speakers, never-making-corrections-but-only-writing guys, those who speak arrogant and rude Japanese, someone who writes weird, (maybe-philosophical,) never-understandable-and-impossible-to-correct entries, and someone too politically too correct.

The commas for "maybe-philosophical" aren't really wrong, but since you're already listing things parenthesis can make it easier to understand this is just an aside rather than a new item.

"politically correct" isn't a phrase that I would usually modify this way, it's kind of its own word that can't be broken apart

But I don't want any more stress besides mythan I get from work.

"Besides" kind of sounds like: "I want stress from work. I don't want stress from anything else."
I'm guessing you'd rather not have any stress at all :D

On the other platform, there awere fewer native English speakers,. And there were never-making-corrections-but-only-writing guys, those who speakoke arrogant and rude Japanese, someone who writes weird, maybe- philosophical, but never- understandable- and- impossible-to-correct entries, and someone was politically a little too correct.

On my first reading, it was hard to tell where the list began. Starting with "there were fewer native English speakers," it sounded like this was going to be a list of reasons you left, but the list is of those who were among the English speakers. So that's why I separated this into two sentences, the second starting with "And" to indicate the rest of the sentence is the second reason, the reason being a list of people.

I used past tense because this feels like the recalling of memories. I'd use present tense if I was trying to convince others not to join.
"I left because it was..."
"You should not go because it is..."

It's notExcept instead of the evil being the dark side of the Force, but I was seduced by another platform.

Makes it seem like you’re continuing after your title, which is a common joke in English!

On the other platform, there are fewer but more… quirky, native English speakers,: you have your never-making-corrections-but-only-writing guys, those -who -speak -arrogant -and -rude -Japanese guys, someone who writes weird guys, maybe-philosophical guys, never-understandable-and-impossible-to-correct entries, and someoney writers, and then one guy who’s just too politically too correct.

Added style! To be specific, I edited it to fit your typical jokey vibe. I feel like that’s the one thing you lack when writing in English; you often come off as pretty dry (to be dry over text basically means to be very bland in character). Don’t be afraid to fall into a specific way of speaking; as long as it’s something you can stand by, that’s perfectly okay!

also, i hope i don’t come off as someone with arrogant and rude japanese…

But I don't want any more stress besides my work., so it’s probably for the best I remain here!

It's not the dark side of the Force, but I was seduced by another platform. I was seduced by another platform, which was not “the dark side of the force.”

On the other platform, there are fewer native English speakers, never-. There were making-corrections-but-only-writing guys, those who speak arrogant and rude Japanese, someone who writes weird, maybe-philosophical, never-understandable-and-impossible-to-correct entries, and someone politically too correct.ly those of whom offer few corrections and I also faced politically motivated arrogance.

Make it shorter

But I don't want any more stress besidesin addition to my work.