counter-strike-global-offensive
I just created a new game in CS:GO with no bots. Then used commands:
mp_limitteams 0
mp_autoteambalace 0
then command:
bot_add_t X3
So now I can play alone against bots but those bots are harmless. I do not know how to change their difficulty. I already used command: bot_difficulty 1 but it does not work. Can somebody tell me how to figure it out?
As you said,by default you should be able to vote maps with number keys(1-8).
In game those keys are used to select your weapons,and as such can be binded to other keys.
So if you change the number 1(primary weapon) to lets say letter K...If you wanted to vote for the first map you will have to press K,pressing 1 wouldn't give your vote.
This is the default binding,if you want to vote maps with numbers 1-8 you should bind it correspondingly.
You should put those settings in the designed steam option for the game.
Right click on CS:GO -> properties. Select set launch options... and type your settings
Example: 
This will save your settings.
Best Answer
Ive found it works when I look at the bots and type the command seperately for each bot.