Ich hasse es, wenn ... Und ich dachte, dir ginge das genauso.
I'm not sure how to interpret the "ich dachte + Konjunktiv" construction:
1: I thought you would share my view, but it has turned out to be wrong.
2: I hate this, and you would surely agree with me, right? {pressuring you to agree}
3: In my opinion, you'd agree with me, {but this is nothing more than an assumption on my part, so it is just as likely to be false as it is to be true.}
... Und ich dachte, dir ginge das genauso.
could be rephrased to
... Und ich dachte, du hättest die gleiche Meinung.
So interpretation 1 is correct.
In this case »gehen« has the meaning »to be in a certain state/condition« (sich in einer bestimmten Verfassung, Lage befinden).
Note that it's more common to use »ginge es« instead of »ginge das«.
Without further context only #3 applies, but already minor additions could shift it to one of the others. E. g. oder etwa nicht would shift the meaning towards #2.
To arrive at #1 I would use Plu-perfect Ich hatte gedacht, to convey, that I no longer believe it due to new information.
