Countless splinter group leaders and wannabe prophets all lay the blame for this at the feet of Joseph Tkach Sr. The problem lies in the fact that this belief is totally erroneous because no matter who would have been appointed there would have been major divisions.
At the time of HWA's death Ellis LaRavia thought he was the rightful heir. Members did not like LaRavia. Meredith thought the same thing because he thought that since he was trained at HWA's feet he would be the logical choice. Apartian was not a leader so he was out of the running. Richard Ames always pandered to whomever was in charge and could never take a stand, so he would have been driven out of office rather quickly. Headquarters members despised Meredith, so it was with a sigh of relief when he did not get it. David Hulme was not a sound choice. Gerald Flurry was considered a nutcase and was not even in the running. Dave Pack wasn't considered even though he brags that HWA personally trained him, which he did not. None off the present day leaders of United Church of God ever made it to the final round because HWA knew what power hungry ineffective men they were.
Whether it was Tkach or any other COG leader out there to this date, the church was destined to collapse. When Jesus is cast aside and the law is given power over grace it is guaranteed to fail, just like every single COG group is doing to this date.