Originally Posted by
Anime
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I am planning to replace the bicycle next month but until then, I want to avoid paying anything more on this bicycle, so if you know the issue and a fix that I can do at home please let me know! Thanks.
Indexed gear systems don't work well when out of adjustment.
It would help if you could better identify the specifc problems. Which gears work well, which don't ? Under what conditions ?
Looks like your chain is off the front chainrings ?
Without spending money, Look up some videos on adjusting the rear derailleur, which may be the problem.
If the bike has been crashed or dropped on the derailleur side, then a bent rear derailleur can cause all kinds of problems.
ParkTool has repair tips, but something seems wrong with their site. I can see the main topics, but the article does not show up.