If these sanctions or unilateral support moves were well thought out they could have strengthen the Russian opposition and weaken Putin hold on power, by only a

If these sanctions or unilateral support moves were well thought out they could have strengthen the Russian opposition and weaken Putin hold on power, by only allowing some of friendly actors to do business/move money around. Yes, it's complicated but could have been a possible solution instead of using the same paintbrush which may backfire in the most spectacular way. These companies who suddenly drop the business, close bank accounts and so on create fear in their customers all over the world, some of them would choose to do business with companies that respect contracts and allow grace periods for their customers to migrate to other services.