Why there is no lot of worship temple for Lord Brahma ?.(Largest lord Brahma statue in the world now @ bangalore)

According to a story in the Shiva Purana (dedicated to Lord Shiva), at the beginning of time in Cosmos, Vishnu and Brahmā approached a huge Shiva linga and set out to find its beginning and end. Vishnu was appointed to seek the end and Brahma the beginning. Taking the form of a boar, Vishnu began digging downwards into the earth, while Brahma took the form of a swan and began flying upwards. However, neither could find His appointed destination. Vishnu, satisfied, came up to Shiva and bowed down to him as a swarupa of Brahman. Brahmā did not give up so easily. As He was going up, he saw a ketaki (Sanskrit - Kaetakee) flower, dear to Shiva. His ego forced him to ask the flower to bear false witness about Brahmā's discovery of Shiva's beginning. When Brahmā told his tale, Shiva, the all-knowing, was angered by the former's ego. Shiva thus cursed him that no being in the three worlds will worship him

According to another legend, Brahmā is not worshiped because of a curse by the great sage Brahmarishi Bhrigu. The high priest Bhrigu was organising a great fire-sacrifice (yajna) on Earth. It was decided that the greatest among all Gods would be made the presiding deity. Bhrigu then set off to find the greatest among the Trimurti. When he went to Brahmā, the god was so immersed in the music played by Saraswati that he could hardly hear Bhrigu's calls. The enraged Bhrigu then cursed Brahmā that no person on Earth would ever invoke him or worship him again. Due to curse by Brighu) even Shiva is worshipped as Linga and no prasad is taken home from Shiva temple.

In the Brahma Purana and Hindu cosmology, Brahmā is regarded as the creator but not necessarily as God. Rather, He is regarded as a creation of God / Brahman. The lifespan of Brahmā is 100 Brahmā years, equivalent to 311,040,000,000,000 solar years. At the end of His lifespan, there will be a gap of 100 Brahmā years, after which another Brahmā or creator will begin the process of creation anew. This cycle is thought to repeat without end.

But your information is not completely true as there are few temples of Brahma.

1. At Pushkar, close to Ajmer. Once a year, on Kartik Poornima, the full moon night of the Hindu lunar month of Kartik (October – November), a religious festival is held in Brahmā's honour. Thousands of pilgrims come to bathe in the holy Pushkar Lake adjacent to the temple.

2.Thirunavaya, Thiruvallam in Kerala and The Trimurti temple and the temple dedicated to Lord Brahma accompanied by Lord Ganesh, located outside Sri Padmanabhaswamy temple, in Thiruvananthapuram, Kerala, is also famous

3. In the temple town of Kumbakonam in the Thanjavur District of Tamil Nadu and in Kodumudi in Tamil Nadu and

• Brahma Temple at Royakotta road in Hosur in Tamil Nadu
• Uttamar Kovil in Srirangam, Tamil Nadu

4.In Asotra village in Balotra Taluka of Rajasthan's Barmer district, known as Kheteshwar Brahmadham Tirtha

 5. In Goa, in the small, remote village of Carambolim in the Sattari Taluka in the northeast region of the state.Regular pujas are held for Lord Brahmā at the temple in Thirunavaya, and during Navrathris, this temple comes to life with multi-varied festivities.

6.There is also a shrine for Brahmā within the Brahmapureeswarar Temple in Thirukkadaiyur, near Trichy

7.A famous murti of Brahmā exists at Mangalwedha, 52 km from the Solapur district of Maharashtra

8.Khedbrahma, Gujarat

9.In Sopara near Mumbai.

10There is a temple dedicated to Lord Brahmā in the temple town of Sri Kalahasti near Tirupati in Andhra Pradesh

11. The largest and most famous shrine to Lord Brahmā may be found in Cambodia's Angkor Wat

12.The golden dome of the Government House of Thailand also contains a statue of Phra Phrom (four face) (Thai representation of Brahma).

13. In Java, Indonesia, the 9th century Prambanan Trimurti temple mainly is dedicated to Śiva, however Brahmā and Viṣņu also venerated in separate large shrines inside the temple compound, a single large shrine dedicated to Brahmā on southern side of Śiva temple. There is a statue of Brahmā at the Erawan Shrine in Bangkok

14. One of the largest Lord brahma (7 feet height 4 faces) Chaturmukha statue in the world Constructed in bangalore. address: 93 and 98 , behind govt school, karivobanahalli, Nagasandra Post
Bangalore ; 560073 , Karnataka / India . NH4 Tumkur Road Ph: +91- 98454 76436. Courtesy:www.lordbrahma.in Note:Temple Open 7.30 to 9.30 Am (Morning), Evening 6.30 to 8.30 pm, Precious day : Sunday

But number of Brahma's temples are rare. 

Note:

Prem Mandir

Prem Mandir, built in the holy town of Vrindavan is one of the newest temples dedicated to Shri Krishna. The temple structure was established by spiritual guru Kripalu Maharaj. The main structure built in marble looks incredibly beautiful and is an educational monument that reflects the true history of Sanatana Dharma. Figures of Shri Krishna and his followers depicting important events surrounding the Lord’s existence cover the main temple.