people are blaming same-sex marriage equality for the current TQ mess

I can see the connection here. Gay rights groups existed to fight the last great 'battle' for true equality. They were (one can assume) reasonably well funded and employed a lot of people. When gay marriage was legalised (and I'm talking specifically about in the US here, because this woke nonsense is very much a US import) these organisations didn't simply disband, thanks for your hard work everyone, back to the 'regular' world of work with you.

It will sound like I've got a tin foil hat on, but I like to think of this as similar to cancer research. There must be billions of dollars of research going into curing cancer every year, all over the world, and the cancer research industry must employ hundreds of thousands of people. If they miraculously discovered a cure for cancer tomorrow, do you think they'd all quietly shut down and that would be that?

A better example might be Big Racism™. People like Robin DiAngelo and Ibram X Kendi make thousands of dollars for appearing at a single event and telling people how racist they are. The armies of Diversity and Inclusion Managers and Unconcious Bias Training Seminar leaders depend on the existence of racism for their very existence. That's why racism is suddenly not only so pervasive that every interaction between two people of a different race is awash with racism in some way, but also so invisible and insidious that the very structures of society itself are now also racist. That kind of 'racism' will never go away and people like Robin DiAngelo will be laughing all the way to the bank until people realise she's little more than a fart in a frock and collectively waft her out of the room.

Second, it's sometimes hard not to agree with the foaming-at-the-mouth conservative radio hosts who argued that allowing gay marriage was a slippery slope to allowing all sorts of other nonsense. We're seeing the nonsense now. It's refreshing to see that things like paedophilia and bestiality are still beyond the pale, but it's only a short leap from 'children can consent to life-changing medical procedures' to 'children can consent to anything an adult can'.

As for your second point, I myself often struggle to reconcile the concepts of 'being trans is a mental disorder' with 'being gay isn't a mental disorder'. I'm not a psychiatrist so I can't weigh in on the intricacies of mental health diagnoses, but I am soothed by the evidence that you can't really 'treat' homosexuality; sexuality seems to be pretty fixed. Attempts at drug or conversion therapy don't appear to work, whereas many (most?) people who undergo intense therapy for gender dysphoria (especially younger people) will 'snap out of it'.

Of course, that's a poor yardstick by which to determine whether something is or is not a psychiatric condition. Many people have intensive medical and psychological intervention for all sorts of 'established' mental illnesses like schizophrenia or anorexia and never 'really recover'.