Disclaimer: Now, I'm not trying to shit on teams, I am trying to figure out why these teams have weak mentals.
DRX
Damwon - most of the time just barely missed LANs
Leviatan - had a massive mental block against KRU for the longest time and choked a lot when they were Australs
Cloud9 - they just looked angry 24/7 during the LCQ
BBL - they only win the matches that help another team qualify instead of themselves