You're being a bit to hard on yourself Cactus.
You're not being demoted because everyone doesn't like you and hates you, cause that's probably not true for the most part.
You're probably going to get demoted because at first, we thought you would be mature enough to handle being a Regular and be able to follow the rules.
After seeing this rage you threw, it showed most that even with your maturity level at times, you will still lose your cool over something as little as an rdm.
That stuff is going to happen, no doubt it will, but the mature way of handeling the situation is to first, try to understand what happened, and if you find out you were rdm'd on purpose or w/e, warning the person and getting whatever evidence. If you can't get any, just let someone know and get the Steam ID's of all the players on the server ["Status" in console] so that what you say can be supported by the witnesses.
When you rage like you did over somehting you wern't even sure about who had done it, it gives the idea to new players to the server that we just hand out the privelage of Regular to anyone and that it's not well kept.
Basically it.
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Sorry if something didn't make sense. Woke up in the middle of the night from thirts and wanted to see if anything is new.Good Luck Cactus, I know you're a cool dude, and being demoted doesn't mean that everyone hates you.
Mature more and if I see that you handle other situations like these much better, I'll recommend you make another application.