The Franklin's Gardens outfit are in the midst of another disastrous season and find themselves down in 10th after Saturday's humbling 63-13 home defeat at the hands of Saracens.
Northampton will not feature in this year's play-off for a third year running, results having failed to improve since the decision to sack long-serving director of rugby Jim Mallinder was taken in December.
New Zealander Chris Boyd will takeover as director of rugby in August but he would appear to have a big job on his hands with England flanker Wood admitting the culture of the club has taken a turn for the worse since they were last crowned champions three years ago.
In a brutal assessment of the Northampton squad, Wood told BBC Radio Northampton: "I actually believe winning the league was probably the worst thing to have happened to us as far as our development and evolution as a team was concerned.
"We stood still, failed to keep pushing the boundaries and looking for new ways to improve as a team and things have slowly slid since then.
"That togetherness, team spirit, buy-in, understanding of one another, synergy and belief in the regime and everything about it is what makes great teams - and we don't have that at the minute."