I have been on both Tinder and Bumble for the last four years, so I think that qualifies me as something of an OLD veteran! Your post resonates with me OP, as I am very much in the same situation as you - similar age and life circumstances. It has certainly been a grim experience, so be prepared to work on developing a very thick skin ......
This is just my experience of course, and others may disagree, but I found Bumble to be absolutely dire. Despite living close to two large cities, I had very few matches within a reasonable travelling distance and the men on the site seemed to be entitled and bad mannered (maybe the fact that women had to make the first move - although that has now changed - over inflated their egos and made them see themselves as a prize to be won). I had dates with 7 men via Bumble and with one exception, they weren't very nice people. They had all stated that they were looking for a serious relationship, but in reality they just wanted a quick shag, followed by a ghosting. However, they probably realised that the women on Bumble tend to be relationship minded, so stating their intentions up front wouldn't get them anywhere.
Rather surprisingly, given its reputation as a hook up site, I had a lot more luck with Tinder. Firstly, there are a many more people to choose from and secondly, people seem to be more honest about what they are looking for, so it's easier to avoid those just looking for sex (assuming that you are looking for something more than a quick hook up). Admittedly, I almost gave myself RSI from swiping left on the dross - which is copious - but there is the occasional match, with whom it's worth chancing a date. I've lost count of the number of Tinder dates that I've had, but I would guess somewhere between 30 and 40. To be fair, on the whole, they were perfectly pleasant guys, but in most cases, there was no spark, although there were a few who I saw more than once. However, four months ago, I swiped right on a guy who I was slightly ambivalent about, as his profile wasn't great, but I thought I'd give it a chance. Long story short, we met, really liked each other and are now in a relationship. It's very early days of course, so I'm trying not to get too over optimistic, but at the moment, I'm very happy with the way that things are going.
Wishing you the very best of luck OP!