Why Does Microsoft SQL Server Management Studio Keep Creating Table Aliases?
The best option is to stop using the SSMS View Designer.

By sticking to using a plain old query window to create or edit views, you will have full control over the queries as well as regular practice in Transact-SQL.

Besides, the SSMS View Designer is known to be buggy (see view corrupted when viewed using design feature) or produce peculiar syntax1 (see View designer strange join syntax) or encourage syntax that has become obsolete and is now misleading (see After upgrade of SQL Server 2000 database to SQL Server 2008 the view is not sorted on the group by column).

So, in short, you will just be better off, in the long run, without the View Designer.



1Not necessarily an issue in itself, but syntax that is not very familiar to you does not lend itself well to maintainability of the query.