How can I quickly find and enable or disable automations?

Is there a way to create a dashboard or submenu of a dashboard (I am not clear on the concept of the power of dashboards yet) that shows a list my automations so I can enable and disable them?

You can enable and disable them in the list at Settings → Automations, however if you install auto-entities and fold-entity-row then you can make lists of entities on your dashboard like this:

type: entities
entities:
  - card:
      head:
        label: Disabled Automations
        type: section
      padding: 0
      type: custom:fold-entity-row
    filter:
      exclude:
        - state: "on"
        - state: unavailable
      include:
        - domain: automation
    sort:
      ignore_case: true
      method: name
    type: custom:auto-entities
  - card:
      head:
        label: Missing Automations
        type: section
      padding: 0
      type: custom:fold-entity-row
    filter:
      exclude:
        - attributes:
            current: "= 0"
        - attributes:
            current: "= 1"
      include:
        - domain: automation
    show_empty: true
    sort:
      ignore_case: true
      method: name
    type: custom:auto-entities
  - card:
      head:
        label: Running Automations
        type: section
      padding: 0
      type: custom:fold-entity-row
    filter:
      exclude:
        - state: unavailable
        - attributes:
            current: "= 0"
      include:
        - domain: automation
    show_empty: true
    sort:
      ignore_case: true
      method: name
    type: custom:auto-entities
  - card:
      head:
        label: Running Scripts
        type: section
      padding: 0
      type: custom:fold-entity-row
    filter:
      exclude:
        - state: "off"
        - state: unavailable
      include:
        - domain: script
    show_empty: true
    sort:
      ignore_case: true
      method: name
    type: custom:auto-entities
  - card:
      head:
        label: Missing Scripts
        type: section
      padding: 0
      type: custom:fold-entity-row
    filter:
      exclude:
        - state: "off"
        - state: "on"
      include:
        - domain: script
    show_empty: true
    sort:
      ignore_case: true
      method: name
    type: custom:auto-entities
show_header_toggle: false
title: Auto-filled Lists

Is there something wrong/missing from “Settings | Automations & scenes” that makes you want to re-invent the wheel? It lists all of your automations, with an on/off slider next to each one…

Spook add-on can give you some deep insights into what is happening on your system.

This is something that should be avoided. Ise condition statements to prevent the automation from running instead of this nearly always is a better solution.