I'd describe it as a tormenting victory for Chen Long. If I remember correctly, this is not the first time Tanongsak tortured him. CL could use more deception, disguised and trick shots and , most importantly, read his opponent's game better and anticipate better as a result.
Have to hand it to CL for his persistence and stubborn resistance. TS can be somewhat inconsistent and temperamental at times but against CL he was at his best, more than once. If TS could play like that more often and against most of the opponents, I'm sure he can achieve much better results than he has done so far.