It's truly amazing how this amoeba with zero reading comprehension and an ego the size of Mont Blanc was voted into DT1 and is just a few votes away from being an active member, despite having no knowledge of or interest in how the trust system actually works.
The trust system is intended to help prevent theft and fraud, you are using it to fight your petty interpersonal disputes. You are certainly well within the rules to leave a neutral rating. Still it reflects poorly on you, as you feel the need to use the system designed to protect traders to serve as a tool for petty retribution for the crime of disagreeing when a discussion in an open forum fails you.
It's a neutral rating. The explanation literally says "other comments". Which you must be aware of since you had to click that option when you posted retaliatory ratings.