'15/'16 was his worst season after '13/14. IMHO:
1 2010/2011
2 2011/2012
3 2014/2015
4 2012/2013
5 2009/2010
6 2008/2009
7 2016/2017
8 2017/2018
9 2015/2016
10 2013/2014
15/16 was by no means his worst . He was decesive in most matches except that Atleti match were he had to play after world cup qualifiers . clearly he was exhausted . By his standards his worst season was 2013-14 . in 2015-16 despite being injured for 2 months he scored 26 league goals , scored a double against Arsenal away , scored in Cwc final against Riverplate ( far better team compared to those clubs like kashima , and other shit clubs ) . Let's analyse his league performance .
Came in after 60th minute against Real and was involved in 4th goal and had a good game ,
came in after 60 minutes against Atleti in Calderon and scored the winner
scored the winner against Atleti in Camp nou . Another closely fought match were Luis was send off for fouling Messi .
Scored winner against kamini and assisted Munir's goal in Rosaleda , a match were we got schooled by that Malaga side
Assisted suarez against Valencia away ( Another closely fought match were match ended in a draw )
scored the Fk against sevilla in camp nou after going down 0-1 in first 10 minutes
After we lost 3 back to back matches in league he stepped again , assisting against Betis away , scoring and assisting against Depo away , scoring against Espanyol
WE were down to 10 men in CDR Final against sevilla , Alba breaked the deadlock from a beautiful pass from Messi , he assisted for the second goal as well. scored in the semi final against Valencia as well