"People on bikes", not "cyclists". That'd be own distinction, of course, but as a cyclist person myself (or can at least be cyclist-adjacent, when I'm a pedestrian or motorist), I am as frustrated with 'cyclists' that don't obey the rules of the road (or even use the not-road, in all the ways that they shouldn't!) as anybody.
The last time I commented specifically (a bike approaching me on the pavement had me check for traffic and step into the road, and intimated, with a smile that this was really entirely the wrong way round), I got the reply "It is what it is". Which I felt to be particularly dismissive of the rider's clear flouting of both legal issues (ignorance of these being common) and practical niceties (inconsiderateness also).
As a pedestrian, I actually avoid pressing pedestrian crossing buttons (if I don't see other people approaching the crossing), if the traffic lets me. If I activate their red light it'll slow them down (at least) far more than necessary, as I'm not the slowest walker. If there's a gap (in both directions, if necessary) I'll take it.
If they are pedestrian crossings integrated with road-junction lights then there'll be green men eventually anyway. I'm convinced that some such crossings have the pedestrian lights 'dummied' to the road lights, they light the "wait", etc, but don't actually (or, at least, don't always) affect the traffic timings. Especially with adjacent junctions being set to pass and release 'waves' of traffic back and forth at busy times (tuned to whether it's a morning or evening 'rush hour').
But, yeah, people are bad road users, on average. Whether two wheels or none or four or six-or-more.