Well, that's had a front end crash. Wonder if the forks are bent as well?
Given that steel is pretty tough you could ride it without it falling apart but why bother. It would annoy me to the point of distraction. Bending it back and filing the ripples off is never a good idea but done a lot BITD for cheap bikes.
The other option is to have the tubes replaced but the lugs often get distorted and would likely be more than the cost of finding another.
Personally I'd look for another frame to put the Campag kit on and sell the frame and forks off to someone who wants a fixie frame.
The forks are ok! And they are original Flandria forks. So either they didn't got damaged in the crash, or they were replaced by a new set...
If it's beyond repair, I think I'll go for a cheap powdercoat... Is bending it back in place and filing the ripples of such a bad choice, if it's done by a professional framebuilder?
I don't think you will find a reputable frame builder prepared to put his name to the bending back/filing fix. Not with Ishy 022 tube maybe with a gas pipe tube frame but then it would be cheaper to buy a different one To replace the top & down tube & paint unless it's a must have/keep frame wouldn't be cost effective.