Can we talk about how the IMDb ratings keep falling?

The ratings keep falling on the IMDb page for FTWD, even almost 3 years after the show ended. Care to discuss this?

For reference, this is every episode that recently had its rating lowered:

• 2x04 Blood in the Streets (7.9-7.7)
• 2x08 Grotesque (6.9-6.8)
• 2x10 Do Not Disturb (7.7-7.6)
• 2x13 Date of Death (7.3-7.2)
• 4x10 Close Your Eyes (7.2-7.1)
• 5x01 Here to Help (7.3-7.2)
• 5x06 The Little Prince (6.6-6.5)
• 5x07 Still Standing (6.9-6.8)
• 6x01 The End is The Beginning (8.5-8.4)
• 6x04 The Key (8.2-8.1)
• 6x06 Bury Her Next to Jasper's Leg (7.9-7.8)
• 6x11 The Holding (7.7-7.6)
• 7x04 Breathe With Me (6.6-6.5)
• 7x05 Till Death (6.5-6.4)
• 7x07 The Portrait (7.1-7.0)
• 7x11 Ofelia (6.2-6.1)
• 7x13 The Raft (6.0-5.9)
• 8x02 Blue Jay (6.6-6.5)
• 8x04 King County (6.5-6.4)
• 8x08 Iron Tiger (6.6-6.5)
• 8x09 Sanctuary (5.9-5.8)