I went to turn on my air compressor which is 240v & the draw of it dimmed everything & the waterwell pulled power from everything in garage on startup
This is probably a classic supply line problem. If the pump is on an opposite leg from the lighting, it's "using up" limited neutral capacity due to a poor connection Dangerous. If the pump is on the same leg as the lighting, well (no pun intended), it's taxing a bad hot connection.  But I doubt that because the pump probably wouldn't even run.  As Ed, 3ph and Harp have repeatedly said here, this situation sounds like an open or compromised neutral feed.  Dangerous for everybody and everything. You're going to need to take measurements in various panels to make sure you have 240 across the hots and 120 to neutral and ground.  Just recently it was suggested in a situation like this to first contact the power company as they will come out for free to make sure their connections are solid.   Let us know what you find, we all learn from that.