When I first started shooting .308, I thought the recoil was pretty harsh.
The heaviest recoiling rifle I shot previously was a 25.06.
After shooting the thing and getting all bruised up in my shoulder, I started to really plant the rifle into my shoulder. I shoot .308 a lot and have not had a bruise in years.
If that rifle hurts you to shoot, you might want to take a good look at your technique or better yet, have someone else watch you closely.
I am not trying to be critical of you but really do hope this helps.
.308 is generally a real pleasure to shoot and I have an LR308, M1A and a Rem 700P. I shoot them all.
Don't be too quick to kick the rifle to the curb.