Retail - most of the good jobs are impossible to get. That's probably what I'll have to do when my current company finishes firing me with my disability. I have used a bunch of the regular job search boards - Dice, Ladders, Indeed, etc. I've also used LinkedIn, Glassdoor, Blind, Hackajob. The tech job market in my location seems abysmal.
gen-x here ... I'd say: anywhere/everywhere but LinkedIn. Be observant and creative.
Personally, I think that using any service that claim to deliver, for which in the real world I just can't find much supporting evidence and otherwise mostly claims from (direct or indirect) stakeholders (incl. users themselves), feels rather dumb. LinkedIn, and the ecosystem developed around it, has every incentive to be dishonest. In such cases, the burden of evidence that proves otherwise needs to be high. I've not seen that bar ever reached for LinkedIn; not even remotely. At least not where I live.
If my perspective leads to people claiming I'm "denying reality" (heard that a few times), it only suggests me how (practically or emotionally) invested some people apparently must be. To me it still looks and feels mostly like a huge fraud-machine. Nothing particularly new specific to LinkedIn though. Before LinkedIn, I've seen how recruitment and hiring agencies wiggled their way into the employment market, where I grew up in. It did not see it do any good. I'd say it shared plenty of characteristics with cancer.
It may take considerable effort, but I'd recommend doing your own due diligence and find potential employers yourself, to then approach them directly. Still works quite well, even today and without needing questionable middlemen/services.