You may enjoy Zero-K more than most other RTS, at least. It’s in the Total Annihilation style like Supreme Commander or Beyond All Reason. One of the ways it sets itself apart is with a diverse array of commands you can issue to your units so they can micro themselves. I haven’t played much of it, so I can’t give a ton of examples, but it has commands to do stuff attack while maintaining distance, compared to how StarCraft 2 forced you to learn to stutter step your Marines, manually alternating between moving and shooting.

It’s also free and open source, based on the Spring engine, and available on Steam. It felt like it played well and was filled out well in terms of mechanics and units when I gave it a try a year or so ago, but I just haven’t been playing any RTS lately.