NETENT reliable in the end or not?

I have been playing NIDETT games for several years, usually gontzo quest FruitShop elements starbust flowers. I have seen with a deposit of 90 euros to reach a profit of 12000 euros in a few hours. The point is that with the advent of covid-19 these amounts disappeared. I would like to ask the following questions to anyone who knows

1. We are told that online casinos have nothing to do with games. That is, the shootings take place on the provider's computers, as there is also a random number generator. How do we know that the provider does not download rtp from 90% and 95% to 80% 70% or even lower whenever it wants.
2. How do we know that the online casino does not lead its players to a fake site where you constantly lose in whichever slot you play when you place high bets and you somehow win when you place lower bets.
3. Independent audit authorities themselves state that they can not be 100% sure 24 hours a day for a provider.
4. There are some slot providers that at certain hours advertise bigger drops and profits, so since they can raise these hours, the drops can well reduce some hours of the day and the corresponding drops.
5. How is it done some hours of the day and especially nights while I have a 100mbps line to send a message to the slot slow network connection and I at that time to run the speedtest and see 95-96Mbps speed.
6. If you have experienced other players with such issues, write here and we will get some tips.

Hello Matsak.

I am Matej, Head of the Data and Complaint Department, and I would like to help you with your questions.

1. Because providers are tested, and it is a long run test + they keep ale the data.
2. If you mean fake providers - it actually happened in the past with few casinos, but it is hard to do this for a reputable casino (especially if somebody finds out). There are lots of websites like ours which are checking this.
3. Nope but they can make a random check anytime, and if something like that happened, then the provider would have troubles for years. (just remember on SkillOnNet and their riggled double up functionality - for years, they were blacklisted)
4. Could you be more specific? I am not sure what do you mean.
5. Casino server/website could be overloaded, or provider server/website could be overloaded.

For example when i play chilli heat of pragmatic play i see a message in the upper corner of the game that for next 3 hours the drop will be more than normal. Not all the time but random times night day afternoon.