RB 951UI-2HND Wireless Mac Clients (i need 100) what modelo Support 100 clients ap-bridge?

Hello, my name is Vinícius, we are starting in the area of Mikrotik and I need to know the best option to serve my clients with hotspot in restaurants, connections through smatphones and tables, always in Ap-bridge, in all my contacts of suppliers and partners they indicate in the AP to work with UniFi, but I want to work 100% with Mikrotik, our scenarios are from small clients, up to 10 simultaneous clients in hotspot (We use RB 941-ND -TC) for larger customers we are using the model ROUTERBOARD RB 951UI-2HND, only that when reaching 40/50 clients connected wi-fi performance becomes almost unusable, even being dual chain, this should not serve a larger quantity, Like 100 customers? The band that we have on these internet clients is around 100mb, what would be the maximum radio troughput of that RB951? If it is not the ideal equipment which would be recommended considering less investment since it serves 80 to 100 concurrent customers?
Thank you