Did you change your front intake fans? Often times, low-end casing’s fans are cheap & bad. If the fans are bad, it will not pull enough airflow even if the casing has mesh front panel. You can test it by opening the side panel & put hands behind the front fans to check if there is enough airflow.
Consider replacing your casing fans with good ones with high CFM. Noctua fans are best but pricey, alternatively Cooler Master sickle flow has good reputation for airflow with a good price.
If you like modding, you can hang a fan with cable ties to cool the chipset. Though, this will ruin your aesthetic view. If your motherboard has no warranty left, you can repaste the chipset.