When is it time to reroll / give up that char

Hello there. I'm currently on the quest to get glad.

In the first weeks of the exp i pushed with frostmage to nearly 2.2k cr.

Since then its been at least 4 weeks all time up and down back to 2k back to 2.2k etc. Yesterday i once again hitted a long time low of 1987.

This mage alone has over 835 3s games this season and mmr is fucked.

When is your point of giving up on dat char and playing something else?

(Part of the reason with the ups and downs is, no consistent team, no voice, helping friends that aint sooo good, and a lot of close games in a row)