Excessive punctuation marks.

Don't, put too many, commas, in sentences, or else it becomes, way too fragmented.

Also I've seen this thing where they just keep going on, never really ending the sentence, I don't really know why, like it's not so hard to end the sentence, it's not that difficult, as this makes a running sentence.

Or doing this! Putting an exclamation point at every turn! It's quite odd 'cause I read it really enthusiastically!

Or just. Ending the sentence. Before it's even a. Sentence. No subject or predicate. (Only a few exceptions, such as names "Ella!" Or orders, "Stop.")

Also excessive punctuation marks!!!!!!! We get it!!!! THEY'RE EXCITED!!! One is enough!!