If you are smart yet "slow thinking", you may have a minor cognitive difference (disability). It's common. Consider that this supposed "slow thinking" instead c

If you are smart yet "slow thinking", you may have a minor cognitive difference (disability). It's common. Consider that this supposed "slow thinking" instead could be "slow audio input processing" or similar. Do you have trouble understanding conversation when there is background noise like other conversation? As others have mentioned "pre-thinking" or preparation will be the solution whenever possible. If you suspect a language processing issue, get it confirmed so that you can plan around it.