You have many reasons to criticise Christian Churches. Don't take it on Jesus himself though.
And you'd be surprised how far and analytically scriptures have been managed to be studied - most of the time researchers can say with 90 % certainty "Yes, this is Jesus's own words" or "these aren't Jesus's own words directly but are right presentations of his values" or "these are musings of the writer based on his sources who propably knew Jesus somehow" or "no, Jesus had nothing to do with this"
Jesus, be him son of god or not, deserves all the praise one human being can. And you'd be horribly naive if you think world got worse due to Christianity. Quite the contrary, world became better place. Without Christianity Middle-Ages would've been far worse and gone longer on.
Lutherian work ethics and Luther's (who was damn smart fellow btw, IQ 190 by some studies) thoughts on role of goverment have been central in creating Scandinavian "dream" societies (from many viewpoints Finland and Sweden are best places to be born in the world). Sorry, I lack the word. Folkhemmet they call it in Sweden. Calvinism has been often seen as reason for development of modern capitalism - though if it is good thing or bad is something to be argued about.
And Jesus's main message of love and turning the other cheek is greatest mankind has ever had. Sure, some kind of Golden Rule can be found from all major religions, but when going into details Jesus's message was even more encompassing