I get the frustration too. The "hate" is funny to me.
When Rendon was on the Nationals, a reporter asked him if he was going to watch the All-Star game (he didn't make the team that year) and he responded by saying, "Baseball is boring." That statement has been blown out of context and "Rendon hates baseball" became the narrative.
I read something last year about he had been talking to his teammates about how to approach each month in the drive to make the post-season. That didn't sound like someone who didn't care.