Couple of questions.
Your system was working fine before you installed the
video-nvidia driver? How did you install this driver? If you use MHWD it installs all the packages required (ie including the associated packages for your installed kernel versions, nvidia-settings, etc).
Are you able to boot into Manjaro Live environment?
If so, what is the output of
mhwd -li in the Live environment?
What kernel version are you using (
The systemd journal flush service is an issue also. What file system are you using? Do you have enough disk space on your root partition? How big are you journal logs? This could stop the system booting (I noticed a couple of thread on Arch Forums), the command
systemctl status systemd-journal-flush should provide error messages to start diagnosing.
Catalyst is the non-free AMD GPU driver, and
catalyst-server is the xorg server for this driver. No idea why this was installed in the first place when you have an NVidia card. Do you have any other catalyst packages installed? These could generate conflicts, but without knowing what is installed, or how they got there, I am purely guessing.
My advice would be to forget the NVidia card for the moment, and simply get your system booting using your intel gpu. Once this is working you can backup your system (I use Clonezilla) and then embark on setting up nvidia card with either bumblebee-nvidia or only nvidia drivers. If things go pear shaped, restore, figure out what went wrong, and go again.
The best way to do this is via the Live environment, using the
manjaro-chroot command, followed by
mhwd command. This allows you to configure your system drivers config from your Live environment.