It's easy to forget just how difficult this is
With 4 missions due to arrive at Mars over the next two months, odds are that at least one of them will fail. It might be a lot worse than that. This stuff isn't easy, folks. Any or all of those missions might fail.
Looking at your list, I counted 35 Mars missions to date, with at least 21 of them being failures. The likelihood of going 4 for 4 over the next 2 months doesn't seem all that high, but let's hope for the best.