There is already a perfectly good feature for this: pressing and holding on the screen collapses the current top-level comment and all child comments.
Example: 211022 Kep1er - Whatever or Kep1er - Song Music Bank 211022.
Heated discussion and arguments are allowed, but keep it clean.
Most of the time I just stick it in the top right corner and it stays out of the way, where it still creates a minor visual annoyance, but if that was all that happened I would not be writing this review.
Please remove it from the app or at the very least give me an option to remove it.
The Biaslist also has a nice about it.