The biggest problem I have seen in VRC so far is that people get dissapointed by "contracts" they made up in their mind, without notifying the other person.
For example: "This is my crush. I will show affection and that person needs to be with me, otherwise I am dissapointed"
The other person (of course) does not know of this deal, does not hold their end of the contract (from which they know nothing about) and in the end stays oblivious why the other person suddenly became sad, or angry, or cynical.

This is not a problem exclusive to VRC. It is a problem that can be seen with a lot of people in RL as well. Also, it doesn't mean one is an idiot or something similar.
In the end it just means we all have to comunicate better, be more open about things. This could be "I have a crush on you", but this also means "I know you have a crush on me and I like you too, but not like that. I'd love to still hang out with you though".

Let's together strife to be the best being we can be in VR.
[spoiler]Love you all by the way. You are really cool people.[/spoiler]