There are people more informed than me to answer this, but here’s my opinion.

Trudeau has been a lame but fairly middle of the road leader. Not actively destructive, but far from the progressive power house he sold himself as. His government has mostly been on auto pilot while the country has quickly deteriorated and cost of living has soared under his watch. The only positive programs that have been passed have been because of our 3rd biggest official party, the NDP, basically forcing their hand since the Liberals are a minority government.

Trudeau definitely sucks and the main reason people want him to step down is because the Liberals need an actual leader if they stand any chance of beating the Conservatives in the upcoming federal election. The current Conservative leader has basically been riding an anti-woke outrage train who claims to have all the answers while cozying up to big business and appealing to far right culture war ideologies.

There’s also a very American style Trudeau hate movement in the past few years complete with FUCK TRUDEAU merchandise seen on heads, trucks, and houses. It’s pretty cringe.

There has been quite a bit, but some notable stuff:

• Was elected on the promise of reforming the electoral system. He immediately betrayed that promise once elected

• Awarded a huge government contract to a charity run by friends of his (WE Charity)

• Pressured his ex justice minister to intervene in a criminal case against a Quebec construction company (SNC Lavalin)

• Bought a crude oil pipeline for $5 billion

• Was caught lying about having done blackface at parties in the past

• His deputy Prime minister just resigned very abruptly and blamed it on him

Here’s a more extensive list: https://en.m.wikipedia.org/wiki/Category:Justin_Trudeau_controversies