I get your trouble with Cubase 12; I had similar issues. So, I switched to Cubase 13, and it's been a lot better. It's easier to use, especially with the new Channel Tab that lets you mix tracks easily. They made the MixConsole simpler to use, too. Also, if you're into editing vocals, Cubase 13 has some excellent new tools like a vocoder and better equalizers.
I learned about these new features on faqaudio. It was an excellent place to understand what's different in Cubase 13 and finally make the switch.