Hes not reuploading them, hes doing the YT meta of changing thumbnails and titles every now and then to get them back into the algorithim.
You aren't alone on souring on him, that seems to be a growing sentiment. His upload schedule is dog shit, yeah Hbomberguy uploads a video a year lately, but his videos are 4 hours long. CGPgrey used to upload 3 videos a year that are a combined 30 minutes, half his new videos are members only, half of his older videos are now behind a paywall too, his last video on patreon is an "early release" that is still behind a paywall. He just dropped hello internet with no notice and cortex with a "hiatus". He's not making anything new but he's still running a patreon which was originally "only charging on video release to keep him honest" but is now a monthly subscription. He's also been open about his favorite goodbye is the "Irish goodbye" so I think he's just done now.