All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
Since that man is as you mentioned that he has a good moral character and is religious, then we advise you not to hasten to ask for divorce or Khul’. The best things that should be taken into account in marrying a person is religion and a good moral character, and all the things which you mentioned can be solved.
Therefore, we advise you to be patient with him and advise him in a good and gentle manner about all those matters. You should clarify to him that he is obliged to spend on you and not to take from your money. The same thing applies to cleanliness and other habits which you do not like about eating. All this can be solved and if this happens there would be no problems.
For more benefit, please refer to Fataawa 86646 and 85361.
It might be that if you separate from him and married another man, you might be in a greater problem with the new husband than your first husband, and then you would regret when regrets will be of no avail.
Therefore, we advise you to take the matter easy and seek the Help of Allaah and then the help of the righteous and pious people whom you think will help you in rectifying your husband.
After all this, if you don’t find a way for reconciliation and you fear to be negligent in regard to the rights of your husband, then you have the right to ask for Khul’. If a wife gives a compensation for her husband in return for him separating from her, and the husband pronounced Khul’ or other words which mean Khul’, then Khul’ has taken place. For Khul’ to be effective, it does not need the ruling of a (Muslim) Judge; it is desirable to have witnesses about it but this is not an obligation.
If a woman obtains Khul’ from her husband, it is not permissible for her to marry another man until her waiting period expires and it is not permissible for her to marry except with the permission of her guardian.
The authorization in the first marriage is not enough; rather, it is your guardian who should authorize him in marrying you off to the other man.
For more benefit, please refer to Fataawa 87728 and 89039.
Allaah Knows best.