Sorry for the delay.
I have consulted with the Sri Lanka monks that I highly respect about your post. These monks are Mayaha Thero senior monks with more than 50 years as monks and they are surely your seniors.
I asked two questions which are:
1 - Is is correct for a monk to criticize publicly another monk using insulting words with the intention of correcting him from some supposedly wrong doing?
And they agree with me that a monk first need to contact the monk that is doing wrong and talk with him privately.
If that monk doesn't correct his behavior, then the monk that wants to correct the other monk has to stop right there because each person is responsible for his own actions and because the monk that wants to correct the other monk has done his best and he also has to respect the limits.
I will add here that in the monks rules, it is strictly prohibited for a monk to use insulting words against another monk.
https://en.dhammadana.org/sangha/vinaya/227/92pa.htm#ch-----2pācittiya 2"omasavāde pācittiyaṃ."
"Not to insult another bhikkhu. If, by means of abusive words, a bhikkhu verbally offends another bhikkhu, he commits a pācittiya."
That is why criticizing with insults was wrong specially because Bhante Samahita was a senior monk and the lower ranking monk has to respect him and never, never attempt to offend a senior monk in public.
Therefore, according to the vinaya rules, the monk who has use verbally offensive words against another monk has COMMITTED A PACITTIYA and he has to confess that offense in his own sangha for his own good.
2 - Is it correct for a lay person to criticize the actions of a monk, if the lay person consider that the monk has done something wrong?
And once again, the monks agree that there is nothing wrong, if a lay person (according to his/her understanding) tells a monk if he is doing something wrong.
Curiously, in the temple, like if the monk was reading my mind and before I asking anything, he started telling a story about a lay woman who appeared to have some mind reading powers. It just happened that there was a monk who each time was thinking wrongly, the women was able to read his mind and warned him about his bad thoughts. Then, the monk didn't like the fact that this woman was able to correct him each time this problem happened, so he went to the Buddha and complained about the woman, telling the Buddha that he can no longer stand being in that forest.
Curiously, the Buddha didn't see any wrongdoing from the part of the woman and ordered the monk to go back to the forest.
So, this story answer your question when you asked me if I was not afraid of criticizing a monk because you also didn't like it to be criticized by a lay person.
If you still don't recognize that you have done wrong. Then, show your post to your senior monks in your own sangha and I hope they can give you a good advice.
I wish you the best.