He was playing early and made a thread posting his impressions which were overwhelmingly positive. He's also friends with some Bioware devs and made that clear.
He got lambasted as a shill, ME fanboy etc. for just posting his honest take on the game. It was completely ridiculous, largely driven by Bioware haters, and he understandably said fuck this place and left and probably won't be back.
The best (worst) part was that even after Shinobi had already basically rage quit the forum, the ME:A review thread also devolved into a circlejerk shitting on Shinobi for for alleged astroturfing and fanboyism. It got locked and rebooted in no small part due to that.
I don't blame shinobi at all. For a longstanding and valued member of the community to be treated in that way was absolutely embarrassing, and paints a very poor picture of the direction discourse here has been heading for a while now (e.g. everybody is a fanboy or a hater, console warzz, everything is either GOAT or awful garbage, opinions are fact and opinions are wrong, etc etc).
Personally I think it's hard to compare characters to the other trilogy since a lot of them got 2 or even 3 games worth of development. I'm not completely finished yet, but I think I like the crew better than I liked the crew right after ME1.
Yeah, this is another thing that people often don't acknowledge when they wax poetic about the trilogy. Garrus and Tali really didn't become interesting until ME2. Ashley and Kaidan are widely acknowledged as mediocre. Wrex is Wrex. Liara was sort of flat in ME1 as well, with LotSB and ME3 fixing that. In a ME1 vs. ME:A vacuum, I'd definitely give ME:A the clear edge with regard to the crew.