What's to say those 45 minutes weren't down to the players and Schopp cocked it up 2nd half with his substitutions !!
It's the manner of defeats and the lack of improvement. If as is said the QPR game was in part excellent then where is the kick in after that? Is that level sustained or does it look as though it is likely to be sustained/improved? The answer is no its not. The manager has now had enough games for the team to buy into and play his tactics and its clear that they are not and are in fact getting worse. The QPR game first half looks a long time ago now and there has been nothing like it since. Brad Collins is regularly the mom. That should not be the case. The sensible thing, although harsh, is to replace the current manager because performances on the pitch are not improving and if anything are worsening. It's that obvious.
You aren't in complete isolation. There are many, many factors beyond the Head Coach that has caused the current pickle we are in, I've already listed plenty of them in previous threads, as have you in this. Sometimes it's just easy to pin everything on the Gaffer though after a few poor performances.