Lets see now..
P-38 was best performing at high altitude due to its turbo mills,
but due to lame Vne, couldn't cut it against the LW or P-51 up there..
So, like its fellow failed expensive high alt' turbo stable-mate P-47,
it was then relegated to the tactical strike role..
But, due to being a big flak target & fragile, losses got so bad that it was
again relegated - to the medium bombing role..
& it wasn't too good at that either..
To sum up, in the ETO, the P-38 couldn't hack the pace.. a dud..