FWIW here are my thoughts.
Some of the problem is the EXPECTATION of the fans.
Our two biggest rivals are Wire and Wigan neither of whom i believe are spending the same money as us on players.
They are the Man U and Man City of SL. We are the Tottenham.
We can give them a good run for their money but cannot keep up with them week in and week out.
Our best chance of a trophy was against Wire in the CC where we were robbed.
Not only do they spend more they have beter and more established youth academies than us. Wire are paying for taxis to take Huddersfield youngsters to Wire to train
Because we cannot match the bigger teams and their resources we do have the mentality in the club of punching above our weight and the psychological effect of thinking our best chance of a trophy is the CC. When the coach says that and we then go out of the CC it is bound to affect the players.
We have probably gone too much for quantity rather than quality players but we are tied in to having to keep our academy products as per the SL rules. As a result we have to pay some of them more than they are currently worth ( although in time they will become worth that money).
We do not have the same level of quality indavidual players as some teams we play as a team. Our strength is as a team. Our first 17 fully fit and playing week in wek out would match anyone. The problem comes when some players are out.
Like an engine one or two bits not working is enough to make the whole thing stop working. You might have a Mercedes but if a p[siton is broken it will not work no matter how much the rest of it is well built.
When we lose one or two players it afects everything else down the line. Losing Lunt means Robbo has top do 80 mins, losing Brough means the kicking game is gone and the forward do not get a rest, losing Brown means the organisation and the plays fall flat, losing LOD means we lose our one leader.
Last year McGuire had 6 captains at Wigan. That was 6 leaders on the pitch at one time. We do not have that that level of leadership on the pitch. This has brought home how important BODGY was to the team.
All of the above has led to the crisis of confidence and hence the bad performances.
All the other points people have made may or not be true that players are injured or overtrained, that some recriutment decisions were bad, that Brown likley to go threatens stability, some players may have given up, too many changes at the wrong time. We probably need a couple of new players particularly a PROP and a centre. We also need a new leader like a O'Loughlin or Sinfield. None of us really know. Despite the bad performances their has been no lack of effort.
I think the reasons for our downfall were highlighted in the first part of the post. No conspiracy theories just a simple explanation.
All we can do is get behind the team and hope they turn it around.