From the https://tvtropes.org/pmwiki/pmwiki.php/Main/EvilOverlordList

4: Shooting is not too good for my enemies.

7: When I've captured my adversary and he says, "Look, before you kill me, will you at least tell me what this is all about?" I'll say, "No." and shoot him. No, on second thought I'll shoot him then say "No."

13: All slain enemies will be cremated, or at least have several rounds of ammunition emptied into them, not Left for Dead at the bottom of the cliff. The announcement of their deaths, as well as any accompanying celebration, will be deferred until after the aforementioned disposal.

The phantom zone ain't gonna cut it.

Imploding submarines are far more efficient

Going easy on traitors is how Germany gave us WWII.

They can still come back from another parallel reality or some such - villains are like cats, they always come back (unless they are bored and then they don't).

Sun's bad then too. Don't want them Voyage Homeing their way into the past

Yes, one is a final solution, the other is just pushing your problems elsewhere without regard for who else it could affect.

https://youtu.be/zoCvqDd2_C8

Back when RT wasn't shit.

To the depths of Jupiter, then.