(Q) Cant install ROMs

Hello there i have G850F and i can not install roms every time i try i softbrick my phone then i have to restore it
Once i install rom i get stuck on fisrt boot screen (galaxy alpha powerd by android) and it dosent move from there then i have to restore
i use TWRP and Eudemony V3 4.4.4ROM
I do factory reset every time
Am trying to install
Resurrection_Remix_LP_v5.4.7-20150609-slte
Or
SMG850F_GalaxyS6Themed_2.5
I think this because my current rom