Khris has explained to you the reasons for the slow progress of this player. He has advised you on what actions you could take. There really is nothing more to be said.
As for playing dead, well strangely enough, the Forum Mods have work, family and daily lives too. I for one did not think any further explanation was needed to your situation. I have 8* players who are very slow to progress. I stop power-training them when they reach 8* and rely on Special Sponsor or MOTM awards. It is normal.
The answer won't change just because you're not satisfied.