There is a popular game called Arena of Valor (?) and it also have rank system.
But they divided players by rank like "Bronze III" "Sliver I" "Sliver II" which can show the player's game skill more clearly and make rank easy to remember.
Let's divide like this:
Bronze I:<2250
Bronze II:2250~2499
Bronze III:2500~2749
Bronze IV:2750~2999
Copper I:3000~3249
Copper II:3250~3499
Copper III:3500~3749
Copper IV:3750~3999
Silver I:4000~4249
Silver II:4250~4499
Silver III:4500~4749
Silver IV:4750~4999
Gold I:5000~5249
Gold II:5250~5499
Gold III:5500~5749
Gold IV:5750~5999
Platinum I:6000~6499
Platinum II:6500~6999
Platinum III:7000~7499
Platinum IV:7500~7999
SuperTux:>=8000
Also we should make icons for that.