To me he was a basically a decent, sane, humane and competent PM, without ever ascending to statesmanship ...

I am certainly not an expert on Canada, but a quick check on his progress over years in the alt media paints a different picture from that you project:

https://strategic-culture.su/news/2023/09/26/trudeau-zelensky-honor-98-year-old-ukrainian-ww2-veteran-who-served-in-waffen-ss/

https://strategic-culture.su/news/2020/02/25/indigenous-communities-revolt-against-eco-colonialists-trudeau-crumbles-under-his-own-liberalism/

https://strategic-culture.su/news/2018/12/16/canada-pay-heavy-price-for-trudeau-groupie-role-in-us-banditry-against-china/

Etc.