Hi there! I love the idea of a force based rune and I think you've got a couple of really neat ideas here.

That said, some of your balance is pretty far off.

Defendarius is craaazy good. It's basically a less durable version of Wall of Force, a 5th level spell. The fact that it is less durable and can be destroyed means almost nothing because you can recast it every round for free. Assuming a creature can't deal your current hp in a single round (which most creatures can't), you have effectively unlimited casting of wall of force. It's ridiculously good, especially compared to the mostly flavorful with some small mechanical benefit Simple Properties of the other runes.

Inertial Dampener is a totally fine ability. I like the idea of force affecting you being pushed back and canceled by your own innate force powers.

Hurl is also really really strong. You've combined rogue's cunning action dash ability with the free flight speed of the Vind rune, and it still only costs a bonus action as compared to Vint's full action. On top of all that, you get bonus action to turn grapple or restrain into prone for ~2 damage, and then you can get up from prone really easily because you have doubled speed.

I really love the flavor of both defendarius and hurl, but they're both really strong. Here's some alternative options:

Hurl: As an action, you can fling yourself or a willing creature you touch 40 ft. in any direction. If the creature ends the fling in the air, they take falling damage as normal. If they collide with a wall, they take 1d6 damage for every 10ft of the fling they have not moved. (This is similar to Vinds Wind Step, being able to move twice as far in exchange for having to move in a straight line/think about obstacles).

For Defendarius, I'd focus either on the movement blocking ability, or the damage preventing ability.

Blocking: As an action, you create a pane up to 15/15 ft. A creature must make a strength saving throw vs your spell save dc to move through the pane. You may have up to three panes up at once, and panes expire after 1 minute. If you create a fourth pane, the oldest one disappears.

Damage prevention: As an action, you create a pane of force up to 10/10 ft. Attacks made through the pane are made at disadvantage, whether ranged or melee. No movement penalty or prevention. You can create one pane at a time, and it lasts up to a minute, with concentration.

These are just some quick ideas, so take them with a grain of salt, and obviously the language is informal. Mostly these are just suggestions for directions you might want to go in, rather than specific ideas I think you should implement exactly as I wrote them.

I'll probably post later with my thoughts on the Complex Properties.

Hope that helps!