What are we doing wrong?? 8 months old and still waking up 4-6x a night

We’re at a loss at this point - our son has never been a good sleeper but it’s recently become worse and worse

He used to nap 1.5 hours 2x a day. Sometimes we would have to wake him up from his naps.

Now - it’s 30-40 mins on the dot before he wakes up.

At night time, he’s up atleast 4-6 times. Wanting to be breastfed or soothe. I started co sleeping because it’s so tough to get up multiple times a night. I thought that would help but it’s not really doing much. We have a consistent bedtime routine at 9pm. Wakes windows are 2.5/3.5/4

There is no signs of teeth, no swollen gums. But he is drooling lots and grabbing at his ears, this has been going on for 2 months.

Please tell me if anyone is in a similar boat? Husband and I are struggling so much.