They could have referred new players to the old demo. The demo was not on the page where the playtest was downloaded. I got a link to it by someone on the discord and he informed me that there will be a singleplayer playtest too.
If there has been problems on the multiplayer due to new people that dont understand the game, it is the DEVELOPERS fault. They should have directed new players to the old demo and told them that there is a singleplayer version coming. And advised all new NOT to play multiplayer at all.
Then you all would have encountered less problems. Right?!
I will test the demo and the singleplayer test. And i still hope to enter multiplayer when i have learned the stuff.