Explain this to me

This table contains stats for heroes' picks and bans.
Rank is used to sort heroes by winrate, taking number of their picks and bans into account. Higher rank means the hero is stronger. Rev-Rank (Reverse Rank) is used to show the least effective heroes with the most number of matches.
Number of bans is calculated approximately based on ratio of matches on the position to all matches of the hero.
Balance metric estimates how balanced the meta is (0 to 100)

Median hero picks (mp): 1 - Median hero bans (mb): 1 - Matches: 2

Remove low picks (0.9mp) Remove low bans (0.9mb)

Balance rank	Winrate	Pickrate	Contest Rate
2.8	5.6	0.0	0.0

Hero	Position	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Queen of Pain	Core Midlane	2	100.00%	100.00	5.56	2	100.00%	2.0	0	0.00%	0.0
Tusk	Support	1	50.00%	94.44	44.44	1	100.00%	1.0	0	0.00%	0.0
Rubick	Support	1	50.00%	94.44	11.11	1	100.00%	1.0	0	0.00%	0.0
Underlord	Core Offlane	1	50.00%	83.33	22.22	1	100.00%	1.0	0	0.00%	0.0
Gyrocopter	Core Offlane	1	50.00%	83.33	22.22	1	100.00%	1.0	0	0.00%	0.0
Death Prophet	Core Safelane	1	50.00%	72.22	33.33	1	100.00%	1.0	0	0.00%	0.0
Gyrocopter	Core Safelane	1	50.00%	72.22	33.33	1	100.00%	1.0	0	0.00%	0.0
Earthshaker	Support	1	50.00%	61.11	44.44	1	100.00%	1.0	0	0.00%	0.0
Disruptor	Support	2	100.00%	55.56	50.00	2	50.00%	2.0	0	0.00%	0.0
Juggernaut	Core Offlane	2	100.00%	50.00	55.56	1	0.00%	1.0	1	100.00%	1.0
Visage	Core Midlane	2	100.00%	44.44	66.67	1	0.00%	1.0	1	100.00%	1.0
Razor	Core Safelane	2	100.00%	38.89	61.11	1	0.00%	1.0	1	100.00%	1.0
Shadow Shaman	Support	1	50.00%	33.33	77.78	1	0.00%	1.0	0	0.00%	0.0
Bounty Hunter	Support	1	50.00%	33.33	77.78	1	0.00%	1.0	0	0.00%	0.0
Death Prophet	Core Offlane	1	50.00%	22.22	83.33	1	0.00%	1.0	0	0.00%	0.0
Batrider	Core Midlane	1	50.00%	16.67	88.89	1	0.00%	1.0	0	0.00%	0.0
Outworld Destroyer	Core Safelane	1	50.00%	11.11	94.44	1	0.00%	1.0	0	0.00%	0.0
Elder Titan	Support	1	50.00%	5.56	100.00	1	0.00%	1.0	0	0.00%	0.0