There are philosophical and technical reasons to not like snaps

Technical

• Slow startup time
• Makes lsblk look really ugly
• For awhile users didn’t have a lot of control over when things updated
• Not designed to work with third party repos by default
• Requires apparmor so it doesn’t work well on selinux distros.

Philosophical

• Backend is proprietary and controller by a single company
• Has made the same amount of effort as flatpak to work on distros that aren’t Ubuntu
• Some people just don’t like Ubuntu