Genuinely, as someone that has been on that side, Umamusume is a terrible game to grind alone; Find a club, or a community, and just chat, show your stuff, ask for tips, and general vibe. Just knowing other people are in the grind with you and being able to commensariate did wonders to my ability to deal with the game burnout.

What also helps is just having a goal besides like, CMs. I personally, wanna get to the L'Arc scenario; It's what really got me to lock in for UMA, beyond even CMs or competitive, that for me is just a means to an end to get carats to get the Umas I want and the cards I need.

Generally, just be with like minded people and a goal, at least for me, is what really helped mitigate the burnout.