I can see where you are coming from, but the lower leagues in England is our market, and if there were better more experienced players available with lots of game time, playing every week etc, 1.we could not afford them and 2. it won't be in the January window in the middle of a season.
This window is about taking a punt on players and hope they can improve the team, we signed the likes of Moult and Bowman with limited game time from league 2 teams and that worked out OK, not every punt pays off as we found out this season but it's about all we can do.
The real work is done during the summer, as for the Japanese boy, all great players have to start somewhere was he not recommended to SH by Postecoglu at Celtic if the rumours are to be believed, so again another punt.
Sometimes the expectations of the fans are very different from the reality the club operates in respect of finances, player availability and most importantly do they want to come to Fir Park.
So given the circumstances I'm not sure what else SH and the board can do differently from what's happening now, he probably deserves a bit of slack and we can judge the signings in May to see what impact they've had, hopefully a big relegation saving one.