Want to have a relationship with insects? Or create conditions where they can live freely?

Destroy what destroys you and them. Let wild things grow.

However, creation of habitats that need active human intervention to maintain is not ideal, because that leaves everyone subject to your whim and ability to follow through with that maintenance. You have way too much power in that situation so please relinquish it!

Resources for DIY-ing things:

• Projects from The Buzz Club, oriented toward gathering data
• Andrew Yang: insect zines - Print them at home
• Amateur Entomologists' Society: habitat conservation - ways you can alter the environment to create more spaces for insects to exist

Ideas

Plant plants

Plant more plants that insects thrive in. Understand what kind of creatures and lifeforms get along well in your environment.
Plants that can mutually support insects and other lifeforms are better homes and food sources than us. I.e.: rather than leaving out food and constructing homes you need to clean/fix periodically, it is better to let plants grow which insects would choose for homes and food on their own.
For north america, here are pollinator-friendly native plant lists sorted by region (Xerces Society).

Plants eat sunshine and water and grow best in particular types of soils. Pick the plants that are best suited to conditions of your locale. Then, leave them be. Then, don't fuck with them. No pesticides. No traps.

Go on regular insect observation walks, record what you see, take photos

My everyday carry: notebook and pen, field guide, hand lens, red light for illumination after sundown, camera.
See: backyardnature.net list of tools for naturalists

Record what insects you see and what they are doing. If possible, go at a regular time and visit the same places. If you can't identify an insect, describe what they look like or draw a picture.
Avoid touching and bothering them or otherwise obstructing their free movement. I only move an insect if ki appears to be in imminent danger.

Insects make fantastic subjects of photography, especially if you have a good macrolens! I would like to share some of my own pictures soon. HOWEVER, getting an in-focus picture, the right angle, etc. is worth far less than the insect's peace. Don't pester them to the point they have to leave! They don't like nosy and insistent camerapeople in their faces!!

Specific contrived insect habitats/supports

Hoverfly lagoons [Description and PDF with instructions on BuzzClub] [WildlifeBCN blog with extra tips] [ChildsplayABC blog with pictures of steps]
* 8:50 instructional video: [Invidious][youtube]

mason bee houses,

Bug Bunkers for overwintering insects [Description and PDF with instructions on BuzzClub]

Earwig hotels [Description and PDF with instructions on BuzzClub]
* 8:48 instructional video: [Invidious][youtube]

Bumblebee pots
* 3:30 instructional video: [Invidious][youtube]

providing water for bees
* Considerations written about in Honeybee Suite posts: [Bees and Water][Help a Drowning Bee][Help a Bee in Distress]
and beetle banks...

Leave signage, art, and literature for others to find

Print zines, make your own zines, leave them in little free libraries. Create a collage or a shrine to an insect. Signage ideas:

• Watch your step! Do not crush animals underfoot
• Leave the leaves! Essential insects overwinter here
• No Pesticides! Drink them yourself!
• etc...

Leave insects the fuck alone

In theory, what would help...?
Glue traps: apply oil or corn starch
Pheremone traps: remove the pheremone cartridge and chuck it into a bush. Sometimes the bottom container simply screws off.
Hanging bags of vinegar: slash plastic sack with a pocket knife.
Poison traps: block access somehow, perhaps with expanding foam.
Zappers: smash

Be creative and safe.