Successful is in the eye of the beholder. But we've had so many seasons attempting to avoid the wooden spoon that this season seems relatively successful.
I think we can be dissapointed because at one stage we were pressing for top two. But, I think, ultimately teams worked out our weaknesses. If they attacked our defence at pace, particularly when catching a FB and DM+CM upfield, we were extremely vulnerable. And our set piece was vertically challenged with the added weakness of a GK who was reluctant to dominate his box in the air.
I'd suggest that's both how we ended up 6th and how we gave up so many leads during the season.
I think we finished about right for a slowish side overall, that was also slow at the defensive end, plus not physically dominating in defence also, aka short. We were well organised, fairly skilful and mostly patient and disciplined, and had Zawada, but that only gets you so far. A solid enough side that lacked physicality and enough magic. And lacked pace.