Just binged this on Amazon Prime but they only have seasons 1-5 Is 6 and 7 even worth watching?

It started of an amazing show first few seasons were fire but it got pretty lazy or they ran out of ideas around season 4, season 5 ends with Axe leaving to Switzerland so I'm assuming that was his exit? The show must be completely different without him in season 6 and 7 am I right? Is it even worth watching season 6 and 7?

I used to have the Showtime app on my tv and then like 3 months after buying an entire year Showtime app dissolved and they totally screwed me(They weren't going to reimburse me for prepaying for a full year even though the app doesn't even exist anymore so I fought tooth and nail and then they gave me like $20 bucks back for my troubles) so I started binging Billions on Amazon Prime but AP only has seasons 1-5.

Should I even bother trying to watch seasons 6 and 7? Or did I pretty much watch the better part of the show ending at season 5? I heard from a lot of people that the show really goes down hill in season 6 but I didnt hear much about season 7 at all?