No, it is not bad,
Just depends if you want a working x
I would read this link if you want to use portage
mixing: http://wiki.sabayonlinux.org/index.php? ... nd_Portage
You can probably fix this, need to know what you did. typically you would run a emerge --sync and then install portage.
You need to remember the sabayon uses a newer version of portage, will have newer dependencies.
equo install portage
My only goal here is to get your system working using entropy, you can read and learn to mix if you want.
I love gentoo and sabayon, I never mix or need to mix myself.
I think your x issue may be from updating compiz with a older portage version than sabayon uses, now you have mixed deps, is only a guess.
I would log in as root
equo update --force
equo install equo entropy
equo deptest && equo libtest
with any luck, this might get you working again, if it does not, you may need to re-install compiz.
We can start looking at logs to see where the error is.