Even if that was correct, who's fault would that be? Certainly not Thailand's, nor Lazada's, as the tone of your remark seems to suggest. There's plenty of online shopping sites in Thailand...
Top 10 popular online shopping sites/apps in Thailand 2022
Shopee.co.th – regional ecommerce marketplace from Singapore
Lazada.co.th – regional ecommerce marketplace owned by Alibaba group
Kaidee.com – means good market in Thai, ecommerce marketplace
Amazon.co.th
PowerBuy.co.th – electronics and home appliances
HomePro.co.th – home decors and furnitures
Advice.co.th – IT products, computers and laptops, etc
Central.co.th – online channel of Central, the largest retail chain group in Thailand
Jib.co.th – IT products, computers and laptops, etc
Priceza.com – price comparison site