Does it really get better?

I'm struggling with sleep. My son is going to be 3 months in a few days and I've sought so much advice from ppl, and all I hear is, "it gets better." It's hard to understand how it gets better when I've been sleep deprived since he was born. He sleeps 2 hours at a time at night, and only sleeps for 20 minutes when put down in his crib, but if myself or husband hold him, he can nap for 2 hours. I'm slowly losing faith here 😭😭😭