3 month old sleep

My 3 month old has the hardest time falling asleep for naps and bedtime. His wake windows are about an hour and a half, so I feel like I spend my entire days just fighting him to sleep. He wakes about 4x in the night as well. Every nap he’s screaming, crying, flailing his body. We’ve tried everything. Shorter wake windows, longer wake windows, routines, “drowsy but awake”, opportunities to try and self soothe, you name it we’ve probably tried it! Does anyone else have a baby like this?? Does it get better?