Maybe you are the 3rd Owner in a relatively short period of time for a reason? Like maybe whoever changed the components created a problem, and he/she unloaded the bike onto the Next Owner because he/she could not solve the problem he/she created.

The Manufacturer originally built the bike with parts that worked together. To have a chance of figuring where a Previous Owner went wrong, you need to know exactly what came on the bike, what was changed, and what it was changed to.

I am not familiar with your bike. Does it current have a triple crank or a double crank and is/was it considered to be a compact gear set? What did it come with originally? Did the PO change the bottom bracket when he changed the crankset? Changing the crankset from a double to triple or triple to a double usually requires a bottom bracket change (different width). Triple cranks usually require a wider bottom bracket then double cranks.

Is the front derailleur designed to work with the crankset that is current installed (double and triple cranks use/need different front derailleurs)?

Is the rear derailleur designed to work with the crankset and rear cassette that are current installed?

Is the chain compatible with the cassette and crankset?

Don't be surprised if you end up changing parts to solve the problem.