There's definitely a lot going on. To me, it sounds like he's having a bit of a breakdown, and I think deserves sympathy and a degree of gentle handling for that...The fact he published his statement at 2am doesn't give huge amounts of confidence it's well considered and was published fully in sound mind. He's obviously standing by it in the light of day - as he should. He's big enough and responsible enough to realise its impact. But it does sound a bit like a cry for help, with all its different aspects (long-standing gender dysphoria, PTSD, rape, car crash and running away, blackmail and so on). It may be pre-empting something else, possibly (an approach by a journalist or something threatening to expose him further?), but it doesn't sound like a statement put out in a prepared manner to make any sort of political point, a controlled "coming out" or specifically justifying the hit and run or anything. I suppose it could be described as brave (or possibly foolish, or possibly attention-seeking, or maybe a mixture of several adjectives) - It's definitely something that not many MPs would do for many reasons and saying you are "not OK" and admitting to having been raped, blackmailed and various mental health issues in such a public way must have been pretty excruciating - so I suppose "brave" is fair.
I think it is interesting the way he "claims" his "trans-ness" or "want to be trans-ness". He doesn't say he considers himself a woman, or wants to present as a woman or use women's spaces. He, rightly, points out he is the same person today as yesterday, and feels no urgent need to present himself in any different way just because he is now "out" publicly. We don't know how his trans identity will manifest- and it's possible he doesn't either, or at least not fully. It sounds as if he had no intention of coming out as trans before the end of his term (maybe he always intended just one term as an MP, and then move on?) - so he possibly has no strong need to be identified in any way other than he is currently, and was happy to wait before exploring it further at a later stage of his life?
According to the recent Scottish census, a "trans identity" is just when your gender identity and sex "registered at birth" don't match 
(no, I don't understand it either). So maybe he just doesn't have a "male" gender identity (whatever that is). Maybe he is agender, or pangender, or cat gender, or anything else, where he wouldn't need to necessarily change appearance or pronouns, or "identify as a woman" to overcome the dysphoria? Who knows? He will almost certainly may well eventually want to explore that in public - and at that point we can object to the issues that raises - but at the moment he hasn't said he wants that, so I don't think there is anything wrong with extending sympathy and support without automatically being suspicious of his intentions.
The other allegations about him re ownership of the sugar daddy website and other dodgy businesses don't reflect well on him - but I don't think are linked to this statement. He can be criticised for them of course, but if he is in a fragile state at the moment, I think it is a bit cruel to start digging all this up now. Yes - he's put it all out in the public domain, so should expect it, and does deserve it. But now may not be the time for him to be called on to justify everything - especially if nothing illegal has occurred that wasn't known about and addressed previously....
Re the dodgy PhD - someone with his name was awarded a PhD by Cardiff Uni in 2015 in panspermia - whatever the hell that is. It may not be him, of course, but I don't see any reason to doubt that.
Yes - I do feel dirty defending a, likely pretty unsavoury, Tory MP. But I think even unsavoury tory MPs are allowed moments of crisis where some leeway is given. I hope he takes a bit of time out to recover and regroup a bit, without getting thrown into "being the UKs first trans MP" and all the various groups who will lobby him on that basis - which I'm not sure he's really up for.