Tribal loyalties and whipping are a problem in the two houses; they can and do override "common sense". Not that common sense is common, of course.
I entirely agree about the TTIP. That will detrimentally affect the likes of us far more than any considerations of "sovereignty", whatever "sovereignty" means nowadays.
I agree the MP's and house of commons are NOT perfect.
A good example is the loss of our personal privacy, due to overly weak and/or poorly written, "snoopers charters" etc. Also the way our NHS private data, is potentially ANYTHING BUT private!
Governments seem to think that giant IT databases, are a good idea, and REALLY secure. E.g. TalkTalk mass hacking (ok it is NOT government, but an example of how things can go WRONG).
But by and large, it is an improvement on other political systems, in general.