I think some cynicism can be attributed to middle age, where you simply find things are not to be taken at face value. That's been my experience with Surrey's Social Services - thoroughly untrustworthy - and of course care homes who are all smiles before you admit your parent and a different story once they've got them. You have more direct experience of stuff but whether one should generalise on the back of that is another thing.
Not sure about the whole buying a Poppy thing any more. I mean, that must draw in millions because they look so good and it's an annual thing, people join in because they like to join in for a good cause, nothing wrong with that.. But there aren't many survivors from World War II these days sadly, and you read stories about veterans of more recent campaigns such as the Falklands and Iraq having real trouble and not getting the right therapy - so where does our Poppy donation go? I think millions were spent on a rehabilitation unit in Hedley, Surrey - it didn't seem to get used. What happened there?
In some ways charities are the new Church - you aren't meant to question it, it's not the done thing. Havens for groomers, bullies and abusers according to reports of overseas operations by UNICEF, the Red Cross, Medicines without Frontiers, though those stories are falling off now. You can say that not all their members are like that and you'd be right of course, but they say that about the Met Police.
I wouldn't donate to the RSPCA after it did that thing of killing a family cat then did the usual State protocol beloved by the NHS suits, Post Office, South Yorkshire Police and so on - engaged in victim-blaming and harassment of the family in question, the famed 'It's not us, it's you!' tactic.
That said, Cats Protection League sound jolly nice, no horror stories there.
My late mother had Parkinson's and I got good advice on the forum of Parkinson's UK and their helpline. However as her condition advanced, I found their tone to change a bit, it got a bit assertive, a bit nasty and I should have noticed but thought I was just being judgemental or unlucky. This was round the time when we got Mum a PEG because her swallow had deteriorated. Later, after her death, we got hold of her medical notes (not having LPA in Health and Welfare we were not permitted to read them before would you believe, we are allowed to after she died which is a fat lot of good). Via the notes I found to my discomfort that Parkinson's UK had been going behind my back to discuss my mother with the local Central Surrey Health. It felt like phoning a domestic abuse charity only to late learn they've been in secret talks with your abuser. That said when the State had put your parent on secret end-of-life care i.e. killing them off, you can expect all kinds of skulduggery - your phone and email might be hacked or tapped and so on, you're in another world suddenly.
Whisteblowers UK is an all party Parliamentary group that is very dodgy - I phoned them for advice and the woman in charge seemed to know my situation already and again, you just picked up she wasn't on your side. Wanted to know how much money I earned, seemed to be a case of 'Can you afford our fees?' or maybe to know my financial situation so the info could be fed back to the powers that be? Phone conversation ended with a bit of acrimony, a bit of a stand off. 'So you're just going to carry on with what you're doing then?' she wanted to know. 'Yep, I said.' Again, as with regulators like the CQC and NMC they seem to the the opposite of what they're meant to be - working for the firms they claim to be regulating, carrying out surveillance on their behalf on complainants, whistleblowers and potential litigants - and getting paid a fortune to do so!