EDIT:
hooo boy back when i still had crappy internet... OH WAIT I STILL DO
tf2 start up the fun way
EDIT2:
I have Starlink now, but it still doesn't really have the ability to game well... lol this is my life I guess.
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enable the developer console. <got to options, the keyboard tab, advanced options, check the box enable developer console>

create server with map cp_orange_x3_tia
hit the ~ key
sv_gravity 300
tf_bot_keep_class_after_death 1
tf_bot_add <team color> <class name(e.g., heavyweapons)>
mp_respawn_wave_time 0
mp_teams_unbalance_limit 0
mp_auto_balance_teams 0