If it’s base model 8GB 256GB then there’s your problem. Maxtech on Youtube proved beyond doubt the SSD on this model is a problem. That isn’t to say it’s a bad machine, but you’ve clearly noticed the limits. A pro with 16GB 512GB+ will serve you well. Even the M1 versions can be found for good prices now.
If it’s base model 8GB 256GB then there’s your problem. Maxtech on Youtube proved beyond doubt the SSD on this model is a problem. That isn’t to say it’s a bad machine, but you’ve clearly noticed the limits. A pro with 16GB 512GB+ will serve you well. Even the M1 versions can be found for good prices now.