Wildfire mechanic is fair. There are various legit ways to counter it--you could easily base in the oasis or the cave during summer, or you could cover your base with flingos. It's just a matter of players thinking it's too much hassle to work with.
While disease is broken. You cannot counter it with a reasonable prevention method other than gathering all your replanted plants almost none stop.
At the end of the day you can choose to turn off game features if that's not your thing, but asking for something to be removed since you don't like it is, in my opinion, unjustified.