I have felt your pain also!
I booked a year in advance from BHX to Oz and got the usual 90k Business Class Avios redemption pricing.
Come to book my return back to BHX and everything double miles for Apr 24!
I thought it was Eid and Ozzie school holidays mandating this demand so I suckered up and bought some extra miles during a Qatar Avios bonus offer to make the pain less!
At least my Lady comes back in comfort but agree with you.
I thought I would be clever and buy a Revenue ticket from Perth to SE Asia. but everything also from everywhere in SE Asia was Double Miles also albeit slightly less base redemption * 2 !
bit of a con isn't it!
At least I got one way at the base price!
Cheers