I think the OP is right to say that FTB are worst affected by rate rises, because they have the lowest loan to value ratios and therefore can't access the best (of a bad bunch) rates. That doesn't mean everyone isn't affected, and it isn't a competition. But on a pure data basis, anyone who bought recently and therefore still owes a lot will be hit hardest by rate rises.
It's also not fair to attack anyone for not knowing that rates were going to shoot up so dramatically. Nobody knew the disastrous Truss government was going to cause a crisis the way they did. I remember when rates started to rise and then that nightmare happened and I'm very clued up on that sort of thing - and it was a shock. I literally stepped out a meeting and called my broker to put an emergency action plan in place. I was fortunate that I remortgaged in May 2023, so with a 6-month valid offer, I was JUST able to secure a new deal before it went totally tits up. If I had had another year on my fix, that wouldn't have been possible; there would have been nothing I could do (unless I took on a hefty early exit fee) - that is absolutely due to timing, not lack of foresight or anything else.
Taking on a big mortgage is always a strain, yes, but the crappy thing is that if OP was renting, she'd be paying much more than £2500 a month, I'm sure, so the choice is between two crappy options - and at least she made the choice that has got her on the housing ladder.
So, all in all, I don't understand the lack of sympathy for all those factors, many beyond her control, or for her choices, which were between a bad and a worse option.
What I do understand is the sense of anger among other posters towards her husband, who seems unwilling to pull his weight and contribute to the family finances. However, that is a struggle that the OP has to handle and a burden she is carrying, so not sure being harsh towards here will help there either.