The downvotes proof how right you are.

Everyone has also forgotten what a mess Steam was in the beginning and it’s getting worse lately in my opinion, at least one major new bug per week.
The Steam client is also what introduces most young people to online scams more than everything else on the net, on the side of becoming a scammer and being scammed.
The microtransactions and the API that can be used for stuff outside of Steam also created a whole black market that is worth millions and introduces kids to completely unregulated gambling and betting.
After so many years Steam still has no real age verification option.
If you die, you can’t give your account to your heirs (you can give them login credentials, but it’s against the TOS), it’s not just that you can’t sell your games or your account.
Steam has lost a plethora of law suits for not following consumer laws all over the world, some ongoing as far as I know.
On top of everything else and despite a few mostly non profitable competitors, Steam is a monopoly which comes with its own problems for users and developers/publishers.

Valve is a company, companies are not your friend. Is it the worst company that exists? No, but that bar is low.