I think that they wanted the number of bots to decrease as you leveled up but it's not working that way. It seems to be working predominantly as a way to fill up queues. You can almost guarantee 80+bots on Vikendi and Miramar (EU, FPP) and even 90+ at quiet times. Erangel get is usually <50 bots but still 80+ at late night.
The number of bots decreases when you are past the "beginner" mmr tier to 80 humans 20 bots per match, where available of course. The reason why there are 80+ bots in a match of a player who has played a lot of games already is because there are not enough players queing for that gamemode and map at that moment.