sad thing is though a new manager will give everyone a fresh start again. This cycle we are in is not working it hasn’t worked for the past 10 years so why not stick it out for another year and try working with the manager? . I think the odds on the new manager starting well then all falling to bits again within 18- 24 months are highly highly likely and I think only a very brave or crazy person would bet against this.
Except we've generally had larger player clear-outs when new managers have come in, rather than after they've been here a few years. Also, which players are you talking about getting a fresh start 'again'? We've already had a huge squad turnover over the last two years, and at this stage the large majority of the squad are players that ETH signed, players that ETH promoted, players that ETH played more than previous managers did, or players that ETH wanted to give new contracts. This is very much ETH's squad of players.
We've sold and bought many players over these 10 years. That cycle isn't working so why not stick with this squad for another year and try using a new manager?
Obviously that last sentence I wrote is ridiculous, but it's the same as what you are saying. It's clear that both the manager and many (probably most) of the players aren't good enough, so we need to have a clear-out of both. Keeping one of the failing parts just because the other part is also failing is insanity.