Bon Jovi had been terrible for ages but yeah - some of the 2021-2022 footage is beyond horrendous. There has to be something wrong with him , whether it be some sort of degenerative illness or (more likely) deafness but he is so far off in terms of pitch/timing it's embarrassing to watch.
In recent weeks apparently he has suddenly improved quite a bit (not saying much) and is turning his back on the audience for most of the show and won't take the mic away from his mouth. Draw your own conclusions.
Yeah, I was watching some videos too, and been reading about what's going on...unfortunately, it really is pretty terrible and not just in the sense of him not being able to reach certain notes anymore (which has been true for a while and not unusual, of course) but, as you say, truly having trouble singing
anything in the correct pitch. It does make you think something is going on, but who knows. It's sad to watch, considering he, and the band, have always put on a solid and entertaining show over the years...