A believer should not be arrogant, because arrogance is a very bad behavior, and it was mentioned in the divine hadith (Pride is my cloak, so whoever disputes my cloak, I will get him into my fire).
If what you say is true, then these people are far from the spirit of faith, because the believer is humble, and the more he worships, the more his humility and his sense of inferiority increases.
As for the one who takes pride in his worship and sees himself as a worshiper, this does not benefit anything from his worship, and on the Day of Resurrection his face will be struck with it.