I need the most inescapable and deadly trap there is

Back story (skip this if you'd like)

I have a friend group that I once hosted a server for, but there was this one annoying guy I hated so much that would ruthlessly make fun of me and never even acknowledge my existence. Everyone loves him, which is why he's the server owner now (he knows nothing about server hosting so he just buys a BEDROCK REALM..). So we just beat the dragon, I got netherite, (not enchanted to full potential but I'm gonna get to that) he is not as stacked but has better armour than me (enchantment wise).

Plan

I want to find where he logs off and his respawn point without him knowing, then I will trap him with bedrock (obtained through glitches) where he logged off. Kill him, either obtain his loot or get rid of it. I will then burn his base to the ground with fire and TNT, but this is the thing I need help with. I need an inescapable spawn trap, one that will kill him too. I absolutely hate this guy and I did nothing wrong to him, karma is karma, so please help me with this.