I checked the sportsbook section and it seems that they share the same provider as sportsbet.io etc where odds are usually great for soccer matches and average or underwhelming for other sports.
Sportsbet provides stuff like boosts etc though which improves the value of their odds with certain restrictions, but I don't think whale provides similar benefits.
Different companies have to build their own products and things that only can be found on their platforms. It makes their platforms are unique and attractive to many users. You can copy that product from your competitor but it's not surely successful for your platform.
Sportsbet is a very big and old casino, with many great products. Whale.io is going to grow up more but compares the platform to Sportsbet is unfair for Whale.io. Suggestion can help Whale.io to improve their platform, current available products and consider building up new products and features for their users. Give them time, with their dedication and capability, they can do it.