Built an enderman farm in main world close to my base. Need advice

So I built an Enderman farm in the regular world, close to my base at the top of a mountain. The very top of the structure where the Endermen should spawn is

An enderman always end up taking a dirt block on my afk farm and it's infuriating I don't know what to do to avoid it.. help? : r/Minecraft

How to make an enderman farm in Minecraft 1.19

Built an enderman farm in main world close to my base. Need advice please - Survival Mode - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum

Anyone know why this enderman farm isn't working? : r/Minecraft

Aesthetic Enderman XP Farm - 99.9% Teleport-proof : r/Minecraftbuilds

EASY & COMPACT* (1.20+) ENDERMAN XP FARM without THE END - Minecraft Bedrock

Tutorials/End survival – Minecraft Wiki

Tutorials/End survival – Minecraft Wiki

How to Make An Enderman Farm in Minecraft (2022)

How to Make An Enderman Farm in Minecraft (2022)