[ipaddr]

You are quiting because mentorship isn't available? Some hr managers would understand that reasoning. They also would understand the long term project desire.

The first two roles seem long enough. The 5 month one is rough and following it with a 7 month one may get some ignores but the market is hot and if you can't land something you could wait until the summer when you have a year.

Aside from all of that, you are putting yourself in a pressure situation at your new role because if you don't like it leaving right away will be much harder. Stick it out a year.

You don't need a mentor with 2 years more experience. You need 2 more years. Give yourself time to fail and grow. That means sticking it out somewhere even if it sucks just to build that cred. If you want better work a startup might be better but if you want more mentorship a big company might be better. If you want neither a middle size company is the way to go.