What's the most tryhard Family Guy episode?

Where is this from?

I fucking hate that Peter is now this all-powerful serial killer who just goes around terrorizing mankind.

When was the last time when Family Guy had a "very serious" episode?

That would be an interesting premise for a show, a serial killer who is aware that he is the protagonist of a cartoon that can't exist without him being a serial killer so he just uses it as an excuse to be a complete douche without consequence

Seth? Holy shit, I had no idea...

Sounds like a better version of The Unfunnies

familyguy.fandom.com/wiki/Rich_Old_Stewie

It took a bit before people realized Season 4+ was different. At the time it was just new varieties of jokes in a show that had multiple different kinds, Stewie using a flamethrower on Brian wasn't that different if you didn't know what the tone was going to be very soon.

Does Rich Old Stewie count? Future Stewie learns Peter is dying and they do stuff like it's real but then at the end it was just the family tricking Stewie to get his money but he kills them right at the end because he expected it. It's not entirely a conventional one like Brian's death but for awhile it's kinda on that type.

It's mainly been cutaway gags for years. Most of the episodes in OP's pic came out after Cartoon Wars