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I wrote a long post, and then it disappeared. So, this time, I'll try to be more concise. First of all, the Swiss system isn't suitable for just 4 rounds; therefore, loss of motivation and various situations are commonplace. The Swiss system should involve at least 8 rounds with 20 participants. Loss of motivation is always inevitable in it. To differentiate between those who are playing and those who are just drinking and doing other things, the system needs some improvement. Increasing the number of days and rounds won't lead to the desired result, in my opinion. Not everyone is ready to play around the clock, and it wouldn't be entirely appropriate either.
In my opinion, the system should be Olympic-style: lose, and you're out. This way, everyone will be highly motivated. Players will keep themselves in check, and those who are eliminated from the tournament can calmly play poker, drink, play soccer, go on excursions, and so on. The list of participants is already roughly known for the tournament. Here, several options are proposed: either the judges create a bracket like in tennis based on ranking, or a blind draw is held immediately before the start. I hope to attend such an event myself someday.