Freddy was a creep.
All the other oaks avoided him. He was the kind of trunk that drank too deeply and got all grab-assy. He once chucked a nest of baby mice into the underbrush just to see how long it took for their mum to rescue them.
The dryads knew better than to shelter inside Freddy. His bark labeled his character very clearly.
Yep that Red Oak was just an asshole plain and simple.