The best way is to use P2P exchanges if you are converting the BTC to cash. You might not be affected so much by the withdrawal fees, as most of the traders in those platforms try to offer the best rates.

If you are not a fan of KYC, check this out - https://kycnot.me/?t=exchange&q=&fiat=on but the downside is going to be trading volume. You will require some time to be able to sell off all the Bitcoins you have.

Then there are also Pseudo P2P exchanges like Binance, Okx, HTX, Bybit. There you will find traders of merchants who offer to buy off the Bitcoins at different rates. However, in order to use those platforms, you must first get verified and also ensure that they allow Canadian Citizens.