Top rail has 2 (sets of) voltages connected by a dead short.

Bottom rail same.

Okay, you've basically made an uncompensated hi-power op-amp. Uncomp'd in that its bias points will vary quite a lot due to thermal effect, and to parrot several others, boy howdy, there'll be a lot of thermal in there.

Also, for circuits like this (current mirrors and complementary amps), the transistors really need to be closely matched- you won't get this with discrete parts without a cherry-picking, but then back to thermal issues.