Experiencing Numerous Issues on PS4

@CeissaDesiste, I have never had to do a new installation, so forgive me for that.  But it would be even more frustrating to not make sure the solution was a simpler one, only to have people trying to help you suggest much more difficult possible solutions, and then finding out a simple one was what was needed. 😞 But since you have done all the early troubleshooting steps we don't need to bother with that anymore. 

Thank you for clarifying the that the majority of the time the mixed up weather in your game is not due to the Mysterious Weather forecast!  I do not know why it would snow in Summer unless that was the forecast.🤔  I've never had that happen.  I have gotten strings of the same weather , sometimes intense, in various saves , at least some Sim years.  But other times I get milder weather and a mix of clear days and stormy days.  It seems random in my game, but I don't play on a PS4 (if that has anything to do with it 🤔 ) and I usually only play a 7 day season.  I do know that for longer seasons the start and end of each season is supposed to be transitional, with the most common weather for each season occurring the bulk of the time.  This isn't that evident on the 7 day season cycle. 

There are EA employees who will read these posts (and sometimes answer), but most of us helping out are just volunteers.  We like to help people get the most out of the game! 🙂  This section used to be called Gameplay Help but was repurposed as General Discussion and Feedback.  Some of us who have been helping here for a long time still feel the need to try to help even if the person posting just wants to vent about the game, as it is sometimes hard to tell what each poster prefers to do.  You are free to list your frustrations here, and I apologize if that is all you wanted to do with your post. 😳  And of course you are also free to ask for gameplay help as well!  😉

Officially "Bugs" are errors in the game that are usually repeatable and happen to more than one person, and many of them are very small.  For example, a certain bed might be bugged to where some actions aren't' available on it.  Other bugs are more serious, like if teens rapidly aged .  (Not real bugs, thank goodness!)   But even a small bug is still a bug.  
The Technical section is really more for those instances where you have problems with Origin, or your computer, at least that is what it is supposed to be.  (And when this section was still called the Gameplay section, we would usually deal with problems like figuring out how to do certain actions or tasks that might not be obvious, like when how to gather impression in the Stylist career, or the best way to get  the most out of your garden.  There is sometimes some crossover in these sections, but that is how they are supposed to work, with the addition of allowing for Feedback to this section here. 😇

Some of your issues, gamebreaking or not, are reported bugs, and the only thing you can do is to click the "Me Too" button at the bottom of the first post in the Bug Report section in order to tell EA just how many people are reporting it, and then you can also add a reply to that thread in order to explain your experience.  Some bugs need more info in order to be dealt with. 

It is also possible that some of your problems are bugs that haven't been reported yet, in which case it is best to fill out your own Bug Report.  (there is a list of known Bugs pinned to the top of the page to help ).  

But some of your problems might be other issues. 😞 

Feel free to vent here if you want, or if you would like continued help, feel free to ask.  We will try to help you where we can! 🙂

Update :  I just read @CGrant56 's post and it does sound like the length of the season is at least partly responsible.  @CGrant56 , do you also play on console?  
Could either of you try and see what happens on a 7 day cycle, perhaps in a new save?  ON a 7 day season, I do get strings of days with the same weather, but only 5 days in a row, max! 🤨