The reason NaVi had a large slump for a year was due to the coaching rule and lack of a leader in that NaVi. When NaVi first added s1mple they removed Zeus. Zeus wasn't calling for NaVi it was actually starix calling as the coach. NaVi removed Zeus because he's a really bad fragger and they had an in-game leader in starix. So they removed Zeus. The first tier 1 tournament NaVi played, ESL One New York 2016, they won the tournament. That was when starix could call. After that, Valve created a rule that coaches could only talk during timeouts and halftime. After Zeus left, seized became the captain and after the coaching rule, the IGL role fell on him. Seized was a TERRIBLE in game leader from 2016 - late 2017. After NaVi got back Zeus, they won their first tournament Dreamhack Open Winter 2017, then they won Cologne, star series, and CAC and has broke all the kill records, rating records, and clutch records.
There's nothing to stat wise to back up your second and third points,
Don't call s1mple a baiter, he has the highest opening kill success rate and is only .1 away from the highest opening kill rating at big events all time at 61.6%.
Any stats to back up that he's an "eco fragger." s1mple is the best player to touch CS:GO, you're in denial.