Introduction to the problem
The part responsible for the splash screen is called Plymouth.
As reported by Wiki.ArchLinux:
Plymouth is a project from Fedora and now listed among the freedesktop.org's official resources providing a flicker-free graphical boot process. It relies on kernel mode setting (KMS) to set the native resolution of the display as ...
The way I see it the output you shared are the reasons for the delay in boot.
You can switch off / uninstall (Bluetooth for example) or install the correct drivers.
Try looking up for each error on Google.
You can also disable the respective services like
There is a lot of information regarding that on Google.
But I too get a black screen ...