I hope I won’t sound patronizing, I mean well, but I’ve seen some posts that have been suffering from massive one-paragraph walls of text, and some that fail to make the point they want to make because they don’t spend enough time with what they are typing. So I’m gonna assert myself and give a few basic advice on how to write.
Paragraphs - This is important to let the reader get a pause and it also lets the reader easily go back and read a certain point you were trying to make. While it isn’t always easy to split up your text in meaningful paragraphs, and sometimes it isn’t even appropriate, at least try. It will be easier for the reader to understand your point(s).
Punctuation - It makes it so much easier to read. It controls the pace and eliminates some ambiguities. Don’t underestimate a well-placed comma.
Calm down - If you are writing, especially when you are angry, you might feel that you need to bang a post out as soon as possible to show that other guy what’s what, or maybe you are angry about something in the game and feel like you have to take it out on the devs. Just take your time and to make your point. Even though there is a person attached to an opinion, counter that opinion, not the person.
Review - Read your post. Split into paragraphs, punctuate and reformulate until it feels good to read.
(Hard mode) Trimming the fat - If you find some sentences that are bloated, trim them. If something feels like it isn’t actually contributing to your post, remove it. This isn’t essential, but it helps.
Just remember, there are a lot of people that will read your post, but only one will write it. So write it for those who will read.