Equalizer,
I read your post and I hope you get better results in the future.
I believe it is very important that you list the equipment that you are using.
What mixer? What soundcard? What mic? and what cubase version? What monitors?
Without listing all of this, it is very hard to truly evaluate your situation.
You may need simply an upgrade for one device only. or other constructive change in your setup. Please let me know. Thanks.