3year old frustrated tantrums

Hi I'm been struggling and feeling really stressed out. My toddler had his usual tantrums but I feel he got worse as he turned 3, he gets frustrated a lot with toys. He is also speech delayed maybe that also has to do with it, he started talk and learn school this year. ... Just been feeling not well sometimes, he's attitude drains me, I try to stay calm but I snap and feels impossible 😟. How can I teach my son to calm down? Thanks.