Can’t disagree about the return on points from the games you mention but for me this is largely down to individual errors.
Watford - Stephens shanking a pass, Manning going missing for the second, THB’s parting gift of a glaring miss.
Lincoln - agree that was shit with substitutes weakening us
Wrexham - how many chances did we miss ?
Bolton - ditto Wrexham, with specific mention to Dobbin
WBA - Dobbin could have won it (first half poor)
Preston - poor, but still created chances.
This makes no reference to penalty appeals.
For me, the failing yet again is recruitment (not the manager).