Did you pass quickly? If not, that may have upset the driver. Not justifying their action, but is a possibility to consider. As for why people are extra aggressive on the TP could be the insanely high tolls. Feeling entitled to drive fast without anyone in their way. Don't know, but could see some having that mindset.

Personally, I steer clear of the TP whenever possible. Cost is nuts and people drive crazy. Also, the trucks with their speed limiters that can result in prolonged passing while blocking both lanes.

3-lanes not only increases capacity, also reduces the instances of blockades which leads to driver frustration. Wish all major highways were 3-lanes all the way. Blue Route is an example of the difference it makes. The upper section flows moderately well, but below milepost 9 where it's two lanes (was originally to be 3 all the way, but was strong public opposition), traffic and aggression increases.