- He gets owned by SSJ Goku.
- He gets mecha'd.
- He comes to Earth to get revenge.
Did he seriously think he'd powered up enough to handle SSJ Goku? It's not like he wasn't too sure, he was very confident, implying that he'd do it easily, right? He can't sense ki, so he doesn't know how strong SSJ Goku was, yet...
Was Mecha Freeza so much stronger than his prior self that he'd now be even stronger than SSJ Goku?
Or was Mecha Freeza including King Cold's support into his plan to defeat Goku?
Or was he... simply idiot?
Or was it a plot device to show what a weakling he is compared to Trunks? No, this is a in-universe discussion.
Tell me what the fuck was he thinking, please...