I do actually see a need for you to switch, Opera is one of the shadiest browsers owned by some weird Chinese company. It collects all of your data and sends it right to China, I wouldn't be comfortable using this, it's far worse than Chrome or even Edge. They also run really weird ads and marketing campaigns, just use Firefox or LibreWolf, the latter has uBlock Origin preinstalled and it's pre-configured for maximum privacy. I can only recommend it!

The problem is that it is chromium based, hence giving Google more power in deciding internet standards (like their web environment integrity API proposed a few months ago)