I have checked with a dictionary for the word inferior with the examples as follows.
1. You make me feel inferior.
2. She makes him feel inferior.
Can I say :
I feel inferior always in all aspects.
Yes, if you're comparing yourself to someone.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.