Don't use just one ORM and then declare "ORM's are stupid". The "object = None" / "object_id = None" issue illustrated here is certainly not a mistake every ORM makes.
Do you have an example of an ORM which is not in some fundamental way "stupid"? I haven't found one yet, but I'd love to know one existed somewhere.
There are several Micro ORMs for .NET: http://www.servicestack.net/benchmarks/#dapper-benchmarks
That don't try to handle hidden-magic-state and lets you easily access via Raw SQL if you need to do complex queries. Many don't try to abstract anything and are simply extension methods over the underlying IDbConnection (so you never lose any flexibility), i.e. they simply exist to remove the tedium boilerplate of mapping RDBMS results back into POCOs.