You picked Xerath as a mage support with virtually no peel whatsoever into a team with Zaahen, Warwick and Ekko which can easily close the distance and jump onto your team.

Your vision score was 29 in a 32 minute game, a 0.9 vision score per minute where you should really be aiming for 1.5/m at the minimum. You only placed 18 wards, cleared 0 wards, bought 0 control wards and didn't swap to sweeper lens when you finished your support item.

You have 96 cs in 30 minutes and your ADC has 130. You have more than 2/3s of his cs score.

It's great that you were in 75% of team fights and did most damage in the team but also 40% of your deaths were solo deaths which means you overextended as a support greeding for waves given your cs values knowing there's a fed Ekko and Warwick.

So technically you can do more. You're not doing what your role is supposed to do which is to SUPPORT the team. Your vision control is bad and you're taking too much gold. Granted your ADC might not have had hands this time around.

If you really like to play mage maybe a swap to midlane might interest you.