TynnyriThese quotes show failures to grasp basic language
"If people disagreed based on playtime, that is a sign of mild alexithymia." No comma should be used connecting a subordinate clause to a main one if the subordinate clause follows the main.
"I really hoped people didn't disagree based on playtime" Hope in simple past tense requires "would" as an auxiliary verb.
"I really hoped people didn't have mild alexithymia." Same as above.
"This is what you first described; Claiming ..." Incorrect use of semi-colon, a colon is used to introduce a quotation.
"These quotes show failures" Failure is generally an uncountable noun, except with specific conditions not met here.
"You seem to lack the reading skills or/and" The grammatical conjunction is "and/or".
"Always possible you were just tired or have a reading disability" A listing comma should be used instead of "or".