Lets go back 5 seasons (not counting this one so far)
Mika in October
23-24 - 10 pts in 10 GP
22-23 - 12 pts in 10 GP
21-22 - 7 pts in 9 GP
21 - 2 pts in 7 GP
19-20 - 11 pts in 9 GP (8 and change, he got hurt early in the 9th game)
He's been a PPG or better in 3 of the 5 and he had a rough start to the 2021 season because he got Covid literally right as camp started (which as far as excuses go, is a pretty legit one.)
I don't know what his offseason training consists of but I wouldn't assume that he doesn't do much. Just because someone isn't posting their shit on Instagram doesn't mean that they aren't doing anything. Maybe he isn't doing much, but thats quite a leap to take based off of an opinion that he always starts slow (which as evidenced above, isn't true.)