How could we trust our consciousness ?!

[Alan V]

We cannot justify our reliance upon reason, but no other system can justify its base assumptions either.  So in that regard, it is no better and no worse than any contrary belief. 

I agreed with your assessment up to this point.  We justify our reliance on reason with reasons.  Reasons are warranted because they depend on observations.  They are better than simply writing another fantasy novel of interlocking and mutually supporting assumptions.

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Brain can simply be a transceiver. Inablity of scientists to produce artificial subjective experience supports this idea.

Subjective experiences likely depend on life, on actually being a subject, rather than on consciousness in any better-developed sense.  In other words consciousness may depend on biology, which explains why scientists haven't created consciousness in machines.