Unless you pretty much have all new parts on your suspension " setting the toe in and letting it go " are about all you can do... if the parts are not tight they will not hold the setting you dial in...
If the car is set up for level road then you are almost always going to be in a " slight pull to the right" since 99 percent of the roads are built with a crown....
I worked at an alignment shop 30 years ago.. and we would tell the people , if the suspension was worn, that all we could do was set the toe in... the problem comes when shops don't say that up front and you think they are setting everything... as if you can align wet noodles...
Now, if you do a complete suspension job that is very different and you should expect them to be able to set it up correctly ....