As I see it, that's the problem - aside from the shortage of BG, which is a topic in itself, I think there has long been a desire, amongst spreads in mainland UK, to see a viable competitor to BG, not necessarily to hurt BG, but just to keep finish plaster at a competitively high standard, on all sides, rather than complacency slipping into the equation due to too much market share, which ends up hurting spreads who have to struggle to achieve a decent finish when a batch is below-par.
When MakeGood appeared (again, I'm ignoring BG shortage during the crisis, for the purposes of this discussion), I suspect there was a reasonable amount of goodwill from mainland UK spreads, who would've liked to see the entry of a viable competitor to the marketplace. What has scuppered that goodwill is a product being pushed through distribution channels that was clearly not fully R&D'd, and many jobs have turned into a bit of a nightmare, when they shouldn't have. To rub salt in the wound, it was being sold, right from the get-go, at the same price as a mature (BG) product.
What the motives were, behind this approach, I've no way of knowing, but end-users have suffered and so, now (inevitably), has the manufacturer. So, yes, I hope lessons have been learned, but I also hope attitudes have been altered in so much as not expecting end-users to pick up the slack for a product that's not been fully R&D'd. Were it not for the BG shortage, I think MG would've been hit even harder by the backlash and scuppered sales.
As things stand, do I want to see MG fail? That very much depends on what their motives were, throughout the whole debacle, and almost none of us can know that, for certain.
If I choose to believe that they were motivated purely by greed and didn't give a damn about end-users, then I could say "good riddance".
If I choose to believe they were just naive and over-eager to enter the market, but with no selfish disregard for potentially making life difficult for end-users, then I suppose I might be willing to sit tight, watch them (wisely) step back from the marketplace, regroup and R&D some more, having learned some painful lessons. Ultimately, I think there is still a general desire to see a viable longterm competitor to BG, but only one that properly R&Ds their product before distributing it to the trade - otherwise, they're just contributing to the problem, rather than their competition helping to improve the problem.
If MG do more R&D and re-enter the market in 6 months time, I might be wiling to give them the benefit of the doubt and at least try a couple of bags, on a non-critical job. Whether that ends up being a good experience for me (and, ultimately, them) is almost entirely in their hands.