He was the champ. He isn't required to jump into peoples guard. He was also a notorious counter striker.
In addition, your entire point is bullshit. Anderson had 13 finishes (2 subs, 11 KO/TKO) out of 15 fights from 2006 (beating Franklin for the title) to 2012 including all his MW title fights and LHW fights. That's an 87% finish rate fighting 2.5x a year, 12 title fights and 3 LHW fights. Anderson's incredible 6 year run is unrivaled and had more highlight reel finishes, and frankly, a better mixture of dominance/extraordinary skill than any other fighter in history thus far.
So sod off with the revisionist "for a while, he refused to engage" because he wouldn't jump into Maia's guard ffs.