We can see that there are heaps of different exercises, sets, reps and weights and it takes a lot of time to build up one training program. Should stick with prefered exercises (try to keep it simple) or try to be creative (having new exercises every new week or month)

Stick to a routine for a good month or two before switching it would be my opinion. If you follow something like Cheat & Recover, you'll have the same structure for 12 weeks (though in that time, you can use some of the alternative exercises to switch things up).

With something like the PPL program, you'll change some exercises between MONTH 1 & MONTH 2, but still be following the same workout structure.

Changing exercises here and there isn't a bad idea, is more about making sure you follow some kind of structure with a program for a good 4-12 weeks before you look at changing the structure all together.

But you should ALWAYS be trying to progressively overload with your training - adding more weight, doing more reps, or doing more sets are some baisc examples.