i'm assuming you want pump based because you're using pre-mixed liquid fertilizer or rainwater, or simply have no way of getting a garden hose over.

And i'm also assuming that you've tried premade drip irrigation kits from home.

I'd consider trying these https://www.amazon.com/Axe-Sickle-Emitters-Adjustable-Irrigation/dp/B01HHJB6I6/ref=sr_1_2?dchild=1&keywords=sprinkler+head+drip&qid=1594666912&s=lawn-garden&sr=1-2

I have these for my system and can adjust at each head which helps. Ultimately nothing is automatic, and debris can clog heads to make them not perfectly balanced as well.

you also seem pvc saavy, so to evently distribute the water to the sprinkler heads, i'd also use this https://www.homedepot.com/p/DIG-1-2-in-Riser-Adapter-with-1-4-in-Micro-Tubing-Barb-R67/100126262

Lastly, in order for you to achieve even-ness, your pump (accounting for head height) needs to overwhelm the output. If your basic water pump is not strong enough, you may consider a pressurized pump

https://www.amazon.com/Camptemp-Diaphragm-Priming-Pressure-Adjustable/dp/B07QWJR1XW/ref=sr_1_24?dchild=1&keywords=diaphragm+pump+110&qid=1594666812&s=lawn-garden&sr=1-24

You can obviously buy faster pumps (3ph), but cost more. Looking at your setup, something cheap and simply would be best. Even though diaphragm pumps don't push a lot of water, These cheap diaphragm pumps can push water at very high pressure to ensure even-ness.

Keep in mind the cheap ones are also loud. I have all kinds of pumps, but my personal favorite diaphragm pump is https://www.amazon.com/SEAFLO-Pressure-Diaphragm-Variable-Reduced/dp/B01CQ7DD0S/ref=sr_1_4?dchild=1&keywords=seaflo+water+pump&qid=1594667472&sr=8-4