This comment is a bit misleading. He's OK with using YOLO, but agrees that using version numbers is misleading. YOLO-v5 is not a succession to YOLO-v4, it's just another version from someone else.
> Just my opinion but I’m happy for anyone to keep using the YOLO name! Just try to avoid version number collisions....
"Avoid version number collisions" means "don't use the same version number". There is nothing in that or any other tweet to indicate he doesn't think that v5 is appropriate, and if you claim otherwise you should provide a citation.