The metal waste pipe is not in line with the bath trap connection and so it leaks when the bath water is drained, no room to adjust anything

Sorry guy you will have to cut/remove something to gain access to the drain pipes. Got a basement or crawl space? What's on the other side of the walls where the shower and tub faucets are?

Here is the general lay out.


https://tse1.mm.bing.net/th?&id=JN.IWTc2ELPKZBGU4Y6TS2ZwQ&w=300&h=300&c=0&pid=1.9&rs=0&p=0&r=0https://tse1.mm.bing.net/th?&id=JN.Syg4UkTj658xaNyFInTpaw&w=300&h=300&c=0&pid=1.9&rs=0&p=0&r=0https://tse1.mm.bing.net/th?&id=JN.QLC33DvuODRxGprFuBffXA&w=300&h=300&c=0&pid=1.9&rs=0&p=0&r=0Consult a professional. How did this situation come about?

Show us a picture.

Yep a photo will help, Thanks.

John

Use ABS / cable driven tub overflow and pipe. Line up and connect bottom part with Trap first, than angle to connect upper overflow with ABS 45's and 22 1/2 bends...

Hope that helps

Milo