I used to have the same issues with soaker hoses (about 400 linear feet with 12 zones) and gave up on them 5 years ago. Algae and minerals accumulate on the inside and reduce the porosity of the hose to the point of being useless. Soaker hoses are designed for low pressure so increasing the pressure will cause bursting. My solution was micro sprinklers. See my post earlier today.

Here is a link that might be useful: Micro sprinkler irrigation kit

It's mineral build-up.

Take off the end cap, coil it into a big bucket or other container, run enough water through the hose to fill it and cover the whole thing with clean water and pour in a gallon or two of cheap vinegar.

Let it soak for a couple of days and see what happens.

have you tried to put compressed air through it?

They don't last forever and do get clogged. If used on top of soil the heat of the sun tends to bake them/shrink them. As mentioned above, i would give it a good soaking for a few days.
Rather than toss them and replace with new, i tapped new holes in mine with a small nail once in place and found i could use them for spot watering new plantings. Works a bit like a dribbler. If a hole ended up on the top side, i just covered with a bit of mulch to direct the tiny fountain down to the soil rather than a mini airborne fountain.

Often they never return to the perfect all over 'sweating' like new ones.

The drip systems are a good investment being able to put the water exactly where you need it rather than all along an entire run. Consider it in a future plan but now give a cleaning a try to use what you have.

In all honesty I have seen people use "soaker hose"
in garden beds for years.
It never lasts.
It always breaks.

I would research netafim techline...

What about if they stop working almost immediately after installation? We got a few for our irrigation system. We tested them, they were working fine, we plugged them in and within a week they have become useless. There’s barely a trickle coming out. Any suggestions?

I had the same issue with a Water Right polyurethane soaker hose. I contacted the company who said it was a manufacturing error. They sent me another and the same thing happened. I noticed any place I got dirt on the hose it got clogged. So it seems the pores are easily clogged. I'm going to try soaking in vinegar to clean the pores and release buildup and then being more careful not to get dirt on the hose while digging this season (which is probably going to be impossible lol). Also a hose filter may help with internal buildup from hard water minerals.