I don't hate Time Machine but I do think it has some issues and limitations which need to be taken into account. I haven't seen anyone else either who actually hates Time Machine. Some people take complaints too seriously.

Time Machine lacks important options for controlling what to backup, where and how often. This creates a variety of both performance and privacy problems. Yes, there are a bunch of configurations you can do and third-party utilities which help but they are not simple and obvious for the average user.

One problem I have had personally is that Time Machine frequently corrupts the filesystem on the backup drive. I end up having to run Disk Warrior on it frequently. On the hardware side, time machine has also run two of my external drives into the ground because of how much read/write activity it creates backing up everything, every hour.

From the standpoint of a computer support provider, the biggest headache with Time Machine is that users think that Time Machine with an external HD is all they need and they don't make offsite backups. If you have a fire, flood, etc. the everything is gone. We had this happen. A plumbing leak on the floor above killed both the internal HD and Time Machine backup for someone where I work.

Don't get me wrong. I think Time Machine is a good option and I use it in spite of its shortcomings. However, I also use other things to make additional offsite backups (over the internet).

TM is Ok but is prone to issues and when a Logic board change sit is a bit of a nightmare to put right without creating a new TM backup.
It is far from sure when it does its backup "trimming" what is being deleted from backup !

I always use TimeMachienEditor with TM it allows control over backup schedules.