How to abandon the project with minimal losses?

Question

Java

I’m just starting (the profile is 100% complete), I was looking for the first order - I responded to a project to develop a bigdata (java) system, after 3 weeks after my proposal (apparently they considered others) - the client responded, sent a small test task, which I successfully completed, then an interview with him (CEO), everything is also ok, they sent an offer, according to the general description, the project looked interesting, so I decided (by the way, by this time I already had another offer for the support of the site - i.e. the project is simpler and cheaper rate).
I started, the project turned out to be overcomplicated by their architect, questions to this architect about cleaning up the mess - hang unanswered, all architectural decisions are made only by him, as a result, instead of java, you fix confusing shell and xml scripts (maven), copy-paste, etc. + at the same time, strict checkstyle restrictions on formatting java code (brackets, variable names, etc.).
For the second week, it already turns back, there is a great desire to refuse by writing tactfully that I don’t fit in skills, etc. (i.e. without mentioning the mess), but I'm afraid I'll get a negative review from him or just a low review without a rating, which, with my zero history, will greatly complicate the search for new orders (right?).
Or maybe write - this is not what he was looking for and offer to exchange positive feedback, is this practiced? This client's history does not shine - 60 hours and only private reviews:

Client's Work History and Feedback (6)
Jobs in progress
Private
To Freelancer: Private No feedback given
Dec 2015 - Jan 2016
Private
To Freelancer: Private No feedback given
Jun 2015 - Jul 2015
Private
To Freelancer: Private
Mar 2015 - Apr 2015

Answer 1

Yes, just work 12 hours every day if the rate is high, formatting is generally done automatically, large projects are never simple.
So then 84 hours a week and at a high rate, as you say, this is happiness than not happiness.