I must be watching a different season unfold to some, because the one I've seen has:

Us having played three (JUST three) league games.
Winning the home game.
Losing two away to the teams who are literally first and second in the table.
Four young players brought in for a fee (three of them less than a month ago).
Green, JCH and MacDonald farmed out.
Many gaps we had filled - and still the CB and CF missing who I think most agree we sorely need.
A lack of creativity remaining (was there before, still need to either drop in a legit number 10 or ease this team into a system where we can attack as a unit).

Other complaints seem to be around TS's lack of interest (see four bought players point - he may not care like he did, but wealthy men don't spend a penny when they're really given up); ownership of assets (covered extensively in prior posts around liabilities and standard risk averse set-up of clubs - also largely immaterial to a three game position); dwindling to mediocrity (we're bang on for where attendance level would put us in a league table, and I personally believe the mistake remains lack of investment in Warne/the ground under Warne - also immaterial to this season, we need to get this project of younger saleable players coming through to fund the next rise); Rob Scott/Management structure (impossible to judge Scott on three games, but we look to have some talent in Martha and Hall at the absolute least, and I'd imagine very few of us would know what influence RS/each manager respectively had over some of the signings we've made that hurt us (Hugill, JCH, Jules, etc) - but retention has remained an issue and this is a management problem)

Do we have problems? Yes, a few. Problems relative to the size of a small northern club which is trying to move from one football model to another. We were never likely to go up or challenge, and I'd voiced my own guess that we'd start erratic and find our feet, likely hitting promotion form in 2026, ready to tweak and push next season. Nothing has changed for me after two losses to teams placed at the top of L1.
Is MH way out of his depth? Honestly, I doubt it. He's been professionally involved in more games than (at a guess) 99% of the entire forum roster combined. Is he right for us as a manager (which seems a more sensible question)? Three games with his players is absolutely nowhere near enough to know.
Are Rotherham fans fickle? They f***ing moan a lot, but I don't know about fickle. Most (in my experience) are more likely to stick to a point of view on a player, manager, etc despite anything, so I don't think I'd call them fickle in the sense that they switch loyalties - be honest, most football fans will whinge about a player for 89 minutes then sing his name if he scores (I'd count myself out on that front with Hugill though).