Staff quit during or after COVID.

As to why that happens, I'm thinking you can only see so many people

1. not doing the minimals of prevention,
2. getting sick and demanding specialist time anyway, and then
3. threatening the staff at every turn,

before you decide to switch to goat-farming and stop being a doctor or nurse.

(Like an EMT at 0830, I guess)

Mostly lack of staff.

Tbf Trudeau gave the provinces $46.2 billion over 10 years for healthcare. Ontario alone received $3.1 billion in Feb 2024. The problem is the provinces refused to sign agreements locking that money into healthcare spending alone ... so they can essentially spend it however they want. source

If you wanna point fingers at anyone, it's each and ever premier who needs to answer the question of where all that money went.