Does the landlord in my section 8 apartment have to replace old carpeting

Depends on the condition of the carpet.

I mailed my rent after a unlawful detainer was filed.

Your landlord is correct to not deposit it.

Can i be evicted for non payment of rent due to bed bug infestation injuries my daughter encountered in our apartment.?

You should consult a lawyer. There are too many possible answers depending on the scenarios here.

Does my Landlord have the right to withhold rent from me while construction is taking place inside my home due to water damage?

There's a lot going on here. You should consult with a lawyer ASAP, there's too much to write.

Unlikely that damaging a countertop that badly is wear and tear. A few scratches, yes, but oil stains are permanent after a while.

What do, I do if my landlord who is also my roommate, breaks into my room, removes my deadbolt and all of my property?

A restraining order and possibly small claims court.

What is the chance of winning bad faith claim, when I haven't gotten a penny of security deposit for almost 2 years?

It's possible, yes. You'd still have to prove bad faith, it's not automatic after 21 days.

Got a letter o 60 day termination tenancy I have an 86yr old legally blind mother can they do that

Absent any other factors like rent control, which I don't believe is present in West Covina, the landlord can terminate your tenancy at any time...

Two Qs about landlord retaliation

Possibly. Consult with a lawyer because it seems many details are missing here to give you a complete evaluation.

That's a new one, I've not seen that in for UDs before. Go to the courthouse and ask the clerks to look into it with you to see why it's...